IROCZ1989

iTrader: (1)

A+ Hands down beautiful. Just opened the box. Remember when i had my Edelbrocks back in the day coated by jethot, this coating Don uses puts them to shame. Pics:





Look how thick these flanges are:



nice welds:



Worth every penny. Will update the fit when I install them. Take care

LB9GTA

iTrader: (1)

Are these the 1 3/4 primary? What size collector?

What did you have before?

peterc005

Bit off topic, but hope you can help.

I have a Right Hand Drive Camaro and have a problem betting headers that will clear the steering shaft on the right hand side. In particular tubes 1 and 2 are a problem.

I notice pictures 49 and 50 in your photo bucket account have headers where tube 1 goes over rather than under, which would be good for me.

Can you tell me the brand and model of these headers (don't look like Dyno Don's) ?

Cheers
Peter

The Project

iTrader: (6)

Yup 1 3/4 w/ 2 1/4 collector.

http://www.top-downsolutions.com/dyn...bes-p-170.html

3rd Coast Z

iTrader: (1)

Is TDS the only place to order these headers from?

Dyno Don

iTrader: (7)

Nope....1 3/4" and 2 1/2" collector

Dyno Don

iTrader: (7)

No, you can order them direct from me.

PM me for details.

3rd Coast Z

iTrader: (1)

Those things are a work of art. I will let you know when I am ready for them. Still debating on pulling the whole motor or not right now.

82tarecaro

iTrader: (4)

Don - do you have a black coating for those? I am thinking about putting headers on my car, but I am hoping to keep it looking as stock as possible. Also on my car, which is a Crossfire 305, the location of the o2 sensor is in the Y pipe. Is it possible for you to make these with the o2 sensor bung in a different location?

Johnny Blaze

iTrader: (15)

I too would be interested in them in a black coating, no need for o2 bung in mine.

Johnny Blaze

iTrader: (15)

I think those are his old edelbrocks.

Dyno Don

iTrader: (7)

Yes, they are available in black.

The 02 can be in a different location.

Johnny Blaze

iTrader: (15)

Pm sent

83 T/A

Will these fit a 1983 LG4 Trans Am? Fit without modification? I have a single cat and the 0'2 bung is on the driver side manifold on my car. How much is a set of these? Thanks in advance.

-Mike

Dyno Don

iTrader: (7)

Installing headers always requires some modding.
I think '83 had a square converter flange on some models.
PM me for price with your details. (smog, zip etc.)

IROCtheRoad

Don has my headers waiting for me at his shop. I can't wait to go pick them up in 2 weeks!

seanof30306

iTrader: (4)

Bringing an old thread back to life:

Hey Don, those are beautiful!

I've had SLP 1 3/4" shorties, and changing the #4 plug was an absolute nightmare! Are there any clearance issues with yours?

Dyno Don

iTrader: (7)

No, mine are easier than any others.

PAFORM350

I have a set of Don's headers on my car. They were and still are great. Easy to install and well made. Great product!

srshll

Give me a price Don 785-844-1475 hllahlavl@yahoo.com 87 gta 5.7 Thanks

watajob

iTrader: (29)

http://www.top-downsolutions.com/powertrain-performance

5spd-iroc

i will also comment on dons headers, they are great thick flanges and absolutely no leaks, running the earls gaskets he recommended and also ordered mine with the dual cat y pipe, fairly easy to install and changing plugs is easier than my old hookers, i noticed on mine i did have to bend the break lines coming off the master a little but nothing major and can be expected, A+++ to don his headers are great and so is customer service

Dyno Don

iTrader: (7)

PM me with your details of your setup for a quote.

91ORANGEZ28

Do you think the dual cat set up is worth changing to from single??... my current exhaust is single style but is a true butcher job with no cat at all.

5spd-iroc

i think if your wanted to run true duals it is worth it which is what i originally wanted but changed my mind and merged the 2 1/2 pipes together into single 4" in the diagonal under the passenger seat and am running a dynatech 4" muffler at the rear, sound is awesome and so much easier than duals

seanof30306

iTrader: (4)

But what good is that 4" intermediate pipe and muffler if you're choked down by a single 2 1/2" cat?

Truth is, a single 3" intermediate pipe flows as much air as the two 2 1/2" pipes. The choke point is the cat, not the intermediate pipe, or the muffler.

5spd-iroc

im not running cats and its the dual 2.5" y pipe merges into 4"

seanof30306

iTrader: (4)

Well that's not really relevant to the kid asking about dual cats vs single cats, is it?

5spd-iroc

well im pretty sure dons y pipe for single doesnt merge the 2.5 y pipes into a single 2.5" have you looked at the pics of the single cat y?

91ORANGEZ28

Dang guy what are you 60? lol I'm just playing with ya... I am definitely not a kid but I'll take it as a compliment. I am not nearly as new to this board as you may think either(2006 maybe?). I plan on putting a converter back on my car before the exhaust is done. As the car sits there is a terrible header-back system full of bad welds misaligned pipes and no cat..
Just wondered since it is pretty much totally gonna be replaced if it would be worth it to add the split cat y-pipe or just go with the standard set up my car came with as the cost isn't going to really be all that much more moolah.

seanof30306

iTrader: (4)

Anyone with 19 posts is a kid.

The stock "y" pipes were 2 1/4". a single 2 1/2" cat can handle that with no chokedown.

If you have a 2 1/2" "Y" pipe, then you can go with either dual 2 1/2" cats, or a single 3" cat, and there will be no difference in the flow.

The problem with the 3" cat is ground clearance. I went with SLP 1 3/4" headers, and a 2 1/2" "Y" pipe into dual 2 1/2" headers. I'm happy with it, but the dual cats did cause clearance problems with my subframe connectors.

I went with Spohn weld-in subframe connectors, and they clear just fine.

ringo234

Don did my entire exhaust system at his in shop, from the headers to the tailpipe twice. First time with a single 3"Catback. About 1 year later he installed a dual Cat system using 2 Magnaflow cats. The difference was about 20rwhp gain.

So yes it's worth going to 2 Cats IMO.

IROCZ1989

iTrader: (1)

Don did you ever check that car on the rack for me????????? Issues with these headers and y pipe making me want to sell them.

JekyllandHyde

iTrader: (3)

I'll also vouch for Dyno Don headers. I was the first person in my car club (NYTHIRDGEN) to put them into my car back in 2009. Since then, 4 more people in my club have put them in. 2 people upgraded from Edelbrock headers. I actually passed up a set of SLP Tri-Y headers (Same as used on the 91-92 Firehawk) just to keep the Dyno Dons in there. These are the best headers you can buy for our cars. They went in easy and have amazing clearance everywhere. My only gripe about mine, was that I wish I had ordered them without the AIR pipes. Oh well, live and learn.

John in RI

iTrader: (167)

It's not all peaches and cream for everyone. Maybe things were OK back in 09' but the recently produced headers have been a problem for me and for others.

I've installed Dyno Don headers & the drivers header hit the K member - HARD. I'd be inclined to believe that this might have been a 1 time thing,.... but I had the EXACT SAME problem with 2 cars using 2 completely different sets of DD 1- 3/4" headers ( without AIR ).

https://www.thirdgen.org/forums/exha...dyno-dons.html

At a MINIMUM expect to be forced into installing Poly Motor mount inserts. Even after the inserts were installed; BOTH sets of Dyno Dons headers I've installed hit the drivers side K member. At least you've got some warning and can prepare in advance.

This way MY experience with DD 1-3/4" headers. Your experience might be different.

IROCZ1989

iTrader: (1)

I am to having issues with this setup. Emailed Don a ton of times, he doesnt seem to concerned about the issues. Wish he would chime in here to actual people who paid and are having issues. Kind of a let down after I paid and have issues I get one or two responses telling me my frame doesnt look factory. Now john had issues with two othee cars. And i know he is right on top of things in regard to using correct parts and documenting everything. So whats the issue here. Can you chime in here Don to respond? thanks.

Dyno Don

iTrader: (7)

Ok, I have been on vacation and came back to a bunch of problems on this end.
I am dealing with each as I can.
I have a car here to tear down and recheck things on this end, bear in mind I have sold a bunch of these and only a few issues.
I will get into it as soon as possible to see if any thing has changed.

IROCZ1989

iTrader: (1)

Ok good. Here is where i am with this. After comparing pics with John this is what ive found. He has about 1/2 clearance on his passenger side primaries to the frame. Im lucky to have an 1/8 or so maybe less. If the motor torqued to that side id be screwed.Flange down below on that side very close to a arm mount ears. My drivers side is ok. Plenty of room close to brake lines but nothing big. John had to cut into cross member on that side to bolt them up. Now he is using original mounts. Mine i cannot tell the difference on these from looking down and cannot see any markings. Drivers side mount bracket has two little holes on its face. Passenger side has a # that starts with 140. I have poly mounts. Don you told me this was causing my issue. But then john had to install poly mounts in a car he installed your headers on to get them to fit. ????? I sent pics of my y pipe you told me the frame doesnt look factory. I dont know how to even respond to that. The cars original. 65000 or so miles never did anything to the frame in this area. Had to crush one of the tubes of y pipe to get it to fit in there. So this is where I am on this. Thanks for chiming in.

IROCZ1989

iTrader: (1)

Really? I have not heard anything back from you any of the times I have emailed you. You have told me its my motor mounts, my frame isnt stock, etc. You have told me a bout 2 weeks ago you were going to check a car on the rack. Never heard anything back. What the hell is going on? I paid you these dont fit, end of story. No ones perfect and mistakes happen. But to ingore me after I sent you money in good faith and constantly make excuses as to why they dont fit is something I cannot understand. There is problems addressed in this thread and you are responding to people looking to buy, but the ones here who have already paid and have issues are ignored. Looks like I will be selling these headers because they fit terrible and y pipe doesnt fit at all. Funny when this happens its always people out of state. If it were local you wouldnt be ignoring me. Definate thumbs down to this whole situation.

Dyno Don

iTrader: (7)

Yes you have, I emailed you several times.
I am not ignoring you never have never will, I am a one man gang and I am doing all I can on this end. You seem to be having issues that others have had and fixed by swapping the mounts.
If you have tried that, then bare with me until I can get this car apart and see if anything has gone ary on this end.
If you have gotten parts that are not right I will make it good, but don't need to get angree with me on an open forum.
You asked me some questions and I tried to give you some answers not excuses.
Remember there are a lot of these sets out there that fit fine.
I am very sorry you are having problems.

IROCZ1989

iTrader: (1)

Don I started with a pm to you around the 20th of May. This is going past the two month mark. I am pretty sure I have the right mounts on there, but I am not pulling this motor just to put new brackets in there. If you havent noticed john has all the " right brackets" and he had to use poly mounts, something you said if I had on the car would cause the problems, to actually get the headers installed somewhat close on two vehicles. Then you told me my frame doesnt look stock. What am I supposed to do? Pull this whole motor on a chance whim I have wrong engine brackets only to put the " right ones" in there and end up like the problems john ran into having to actually cut into his crossmember.
I have no room on passenger side, he has no room on drivers side. My y pipe hits the frame by alot . You know after dealing with so many people in the aftermarket since 95 when people tell me they are trying to help but are a one main army , Im sorry I really have nothing to say about that at this point. I paid you, and a good amount too. And all you have is excuses one after another. You told me on two occasions you had a car apart on the rack and would get right back to me , never did. I have the emails if I need to post them. Then the kicker here and #1 reason I am getting angry in an open forum is that me and john are posting about problems we are having and you dont respond back to us, but to someone else looking to buy a set of headers. Im about done with these things I have had two other sets on my car never the problems or agravation Im having with these not by a long shot. Next step is these headers are getting sold. Id send them back to you and let you deal with them but after two months and no offers from you to take them back and even consider looking at them or taking dimensions or pictures it seems like you have washed your hands of this. You want to talk about one man band? Well I guess I am too only I didnt make the money on this transaction like you did ,I lost it and then some.


Was debating between these and the hawks ones when I was going to purchase a set, should have went with the hawks ones all day. Called them up yesterday and actually spoke with the owner about this issue im haveing and where I am on this.To make a long story short he isnt going to let me eat crow if I have an issue. He told me test fit them if they dont fit send then back, but he is confident they will fit poly mounts and all. And if I do need engine brackets he has them. He said he will do what it takes to make it work. No excuses.

If I was the only one I would have pulled this motor a long time ago. But after seeing two cars not fit with all the supposed right parts and then fit somewhat with poly mounts you said was my problem at first, Im at a loss. Like I said big thumbs down to this whole situation.

Dyno Don

iTrader: (7)

Today July 26, 2012

I have a random car, I have picked a random set of headers, a random set of pipes, both single and dual and I am posting the picture of them all.

I also have a picture of the mounts showing the difference.

Everything fits just fine on this car, nothing hits, some spots are close, but nothing hits.

Right side


Left side from under the car with a light on top


Left side dual pipe


Single crossover


Difference in the Mounts


Camarorookie (Troy) was here and verified everything.

TTOP350

iTrader: (8)

IROCZ1989

I'm just wondering what trans and crossmember you and your friend thats having problems are using??

IROCZ1989

iTrader: (1)

Im using the stock 700r4 with stock trasmission crossmember.

TTOP350

iTrader: (8)

Gotcha. I have no idea where your headers are hitting so Im just poking around here.
Is there any way the trans mount is worn out or the crossmember could need adjustment to move the headers a bit?

IROCZ1989

iTrader: (1)

Im going to look at my ypipe tonight but yours looks differerent than mine where both pipes pass the frame. Glad you posted pictures. Only thing is I wish you had our sets of headers and pipes to check. I know johns hits he sent me pics. And the gap on the header flange to head on the other car he did. Something is a miss with these headers. All three of us have issues. Now you say the correct mounts move the motor over to the drivers side a 1/4 inch? That drivers side connection flange looks like its laying on the k member, but I think its the angle of the pic. Ok what can I check now? What about johns car where the poly mounts had to be used to get the headers in on two cars? Somethings off here and I dont know where to begin. I wish we would have begun this exchange a month ago. They say the correct mounts make the motor sit lower in the k member. Mine cannot sit any lower. I basically have room for the brake line and can barley fit my finger between the pan and k member now. Its tough to tell if I habe the correct mounts or not but Im sure I do. Never had an issue with other sets and everything looks correct engine wise the way it sits. Passenger side crossover comes out about where it should its just when you try to attach the drivers side its like its too long and to fit it on the ball end of header it ***** the whole y pipe and this is when it hits the frame. If you habe the y pipe off the passenger side without the drivers side hooked up it sits fine in there. Whatever it is its giving me a thumping headache. Ill check tonight .

Dyno Don

iTrader: (7)

I will make another y-pipe tomorrow on the same tooling your was made on and try that on this car.
That Y-pipe in the picture came off an '89, this car is a '91 (not that that makes any difference) they are all the same, but I guess there could be some various minor things.
I didn't have this car before to check when you said you had the issues (just got it apart today).

IROCZ1989

iTrader: (1)

Ok no problem. Its fine if you tell me whats going on, completly ok. Just cannot get my head around it when you tell me you have one on the rack and you will get back to me asap then I dont hear from you. The thing thats got me wondering in all this is that when everthing is bolted up. The 45 you supply with the y pipe to go to the cat doesnt line up it points to the inside of the cat. If your looking at the cat from passenger side it points more to the right.

Transmission mount is new poly unit. Bracket is basically new. Car only has 65000 on it. Ill check everything tonight again.

Dyno Don

iTrader: (7)

Darren:
Here is a picture of the crossover freshly made on the same tooling as yours,
it fits perfect.
Everything lines up as it is suppose to.
Unless something happened between here and there yours should be right.
You have to make sure those mounts are on correct.

camarorookie

I've helped Don install at least 10 sets of his headers on 3rd Gens and C4 corvettes and 8 of them had fittment issues due to clapsed motor mounts or the mounts are on the wrong side. I know it's frustrating, took me 8 hours to figure this out on my corvette, but after I did it took me 3 hours to install them. The headers are of the best quality and really increased my exhaust flow, I gained 35hp on the dyno with just Dons exhaust.
Be patient and work your way through the fittment issues. Sooner or later, the motor mount issue would have to be fixed anyway.