Could take a set no airtubes but need y pipe

 

I’ll take a set no air tubes

 

The headers are ready for orders..... go to:

top-downsolutions.com

https://www.top-downsolutions.com/po...in-performance

 

Hi Don, when will orders close? Is there a limited quantity? Thanks!

 

Just placed my order. Woohooo!

 

so just to confirm, the ypipe connects your headers to the factory exhaust? So if I bought a exhaust kit that was cat back, it should work with your y pipe?

 

Yes

 

Put mine on last week, went on without any major problems. Y pipe fit way better than any I have dealt with. Thanks Don!

 

Don - looking to get my order in but have just a few questions

1) For the headers, does the included 02 bung work with the factory 02 sensor without modification or is an extension generally required?
2) For the option to add an 02 bung, is a cap included and/or can you provide the thread so we can install a cap? I don't foresee having a second 02 installed most of the time, mostly just for tuning purposes but would like to have the option down the line
3) For the dual cat pipes, confirming that they connect from your headers to the factory cats? The previous owner deleted the cats and I live in an emissions state so I'll need to have new pipes fabbed up anyways for new cats and plan to do a custom dual setup so wasn't sure if the dual cat pipes bought me anything since I won't be re-using most of the factory exhaust.

Thank you!

 

Are you still offering just the Y-Pipe? I need one for my Edelbrock headers....
Please let me know if you do and how much.

Thank You!
Hugh

 

He makes the Dyno Don Y pipe for Edelbrock TES Headers in a single cat version and a dual cat version. He sells his products at Top Down Solutions.

Dyno Don Single-cat Y-pipe for Edelbrock TES Headers.

Dyno Don Dual-cat Y-pipe for Edelbrock TES Headers.

Dyno Don Collector for Dual-cat Exhaust.

 

Hi Don can you send me a price for headers and y pipe for 87 camaro iroc 350 thanks.

 

See post #153
For orders

 

Got my headers and Y pipe from Don/Lon the other day and they're beautiful! Thanks Don! ....will post up with some pics once I get 'em on the engine, which, isn't even in the car yet, lol!

 

say what was the damage.

 

"about" $1000 plus shipping for headers and Y pipe.
https://www.top-downsolutions.com/po...hout-air-tubes

 

is that us or canadian dollars

 

The prices are in US Dollars.

Of all the reasonably affordable shorty headers made that fit our cars and use the factory style exhaust routing Dyno Don's are the best on the market. Period. Bar none.

There were other good headers on the market before by many companies. They either aren't making them anymore or if they still make headers for our cars they quit making the good ones they used to make and just make the crappy ones now. Holley and Hedman come to mind.

I consider the SLP 1.75 primary tube 4 into 1 shorty headers to have been some of the best that were made for our cars. Dyno Don's headers are the spiritual successors of these headers but refined to further perfection through many years of Dyno Don's R&D and blood, sweat, and tears.

Dyno Don is getting on up in the years and wants to enjoy his retirement. He puts out batches of these from time to time to help us 3rd genners out and put a few bucks in his pocket. At some point this is going to end without someone to take over for him.

If you want a set of his headers, Y-pipes and other exhaust parts then don't F around and get them while you still can.

 

Check the link. That's why I included it.

 

What's diameter are the dual cat replacement pipes for SLP headers, I see on TDS website? https://www.top-downsolutions.com/

I'm looking for something larger than the 2.25" they came with. A 2.5" or even 2.75" pipe diameter would be ideal. Thanks.

 

The pipes are 2 1/2"

 

Are these still available? On TDS they show they are made to order, just confirming. Second question, I have an 88 5 speed vert, I want to make it a dual cat car, is it worth it, and would two hi flo or replacement cats fit with the dual cat y pipe with the dual cat collector>
Thank you in advance for any opinions or help!

 

Simple answer, yes they are still being nade to order and can be purchased from my website.

Lon Salgren
Top-Down Solutions
626-369-0040

 

I have an 89 with Edelbrock shorties and a single cat, how much more to the wheels will the dual cat setup get me compared to the single cat pipe from Dyno Don? Do the duals come with cats or would I have to get those separately?

 

I had those for years. Dons are much better flowing. Like much better. Depending on your engine, you could absolutely pick up some HP. If it was a stock 305, not so much. Dons don't come w cats. I thought my TES headers fit well. Dons fit better.

 

You supply the single or dual cats. Ic comes as shown and described on my website.

Lon Salgren
​​​​Top-Down Solutions
626-369-0040

 

I have a 350, I’m currently in the process of maximizing everything the stock HCI could give me, to include yanking the spare and jack. UD pulleys are on the way. So Dons make that much of difference? Which ones and y pipe did you get?

 

@DropTop8T8 and @89GTAPhoenix

Dual cats are a waste of time on a LB9 TPI engine.

Dual cats are a waste of time on an individual long tube runner 5.7L L98 TPI engine too unless you are making some REAL Horsepower. 400+ HP which you ain't going to be making with a naturally aspirated 350 LTR TPI engine.

2.5" dual cats might be useful on a 377, 383, 396 LTR TPI engine and that is if you run a true dual 2.5" exhaust system all the way to the tailpipes or Y merge with a 3.5" outlet and run a full single 3.5" exhaust system.

Both of your cars are setup for a single cat exhaust system. The cat convertor to underbody heatshield and the transmission to cat convertor flange exhaust system hanger is setup for a single cat exhaust system.

GM wasted their time with the N10 dual cat exhaust system. The restriction wasn't in the H.O. catalytic convertor of the single cat H.O. exhaust system. The restriction was in the horrible T merge pipe between it and the H.O. cast iron manifolds.

John Lingenfelter took an early production 1989 Pontiac Firebird Formula 350 with the single catalytic convertor H.O. exhaust system and built a 375 HP 383 Street Ram stroker motor and the car did 1.5 to 1.6 60 foot time and ran 12.4 to 12.6 in the 1/4 mile at 104 MPH to 106 MPH and did all that through the factory assembly line installed GM "AC" H.O. single catalytic convertor that wasn't gutted and the car could meet C.A.R.B and EPA emissions standards.

I'll post a link to the article about that Formula 350 later when I find it again.

 

here are some side by sides of the tight spots on the tes vs dons. The y pipe and collectors are really restrictive, dons are much more free flowing. The TEs headers were the move in the late 90s. I was psyched to have headers that didn't drag on the ground then. Dons flow well and don't drag on the ground!

 

Imagine how much more it would’ve made with a good flowing exhaust. The N10 grabbed an extra 10 hp in stock form. Interested for that article.

Are those Don’s midlength or shorties?

 

Can clearly see the GM OEM "AC" single cat. I might be wrong about it being the Accel Street Ram LTR TPI induction system but it is a LTR TPI system.

 

Awesome, what does AC stand for? I see he also upped the gears in the back.

 

Yes, those are dons headers, if you look in the collector the flow difference is massive. The TES collectors have pinched down primaries. Dons are round. Probably insignificant on a stock L98. The head flow is limited on those heads. When I stepped up to bigger heads I needed more flow. The TES w a 3 inch H.O. exhaust are probably more than adequate on a L98/tpi w some mild mods. My zz4 w TES headers was great. My zz430 clone needed more breathing room, especially w the pro flow XT intake. Now I have dons headers to a 3.5 exhaust. Revs much better.

 

GM had many different divisions over the years doing and making different things. Over the years they got shuffled around, mixed up, combined, split up, sold off and all sorts of things.

AC was one of them and Delco was another one of the many divisions. AC made many things with the catalytic convertors being one of them.

 

Aware of AC Delco, thanks for clearing that up

 

I have Edelbrock's as well, bought them many years ago then had them Jet Hot coated. I know 100% Don's are better, my question is, will upgrading show a noticable difference? I always try to go top choice on parts nowadays, but since the Edelbrocks are long paid for, would the $1400+ be worth it if you closed your eyes? (In the passanger seat of coarse )

 

for me yes, it's an easy answer. My engine/blower required it. A stock/slightly modded tpi, I doubt it. It's all about flow and rpm. Tpi cars start to run out of steam by 45-5000. Even my car before the blower I noticed an upper rpm difference w dons vs the TES. But that was on an engine that pulled well up to 6-6200.

 

Well as much as I want to jump on a set of Don's, hard to part with that much $ for the amount of gains. But I still do want a set......

 

And this is why Don is the ONLY supplier left.

 

yeah, that's true. His headers are awesome. People who can do what he has are few and far between. Fabricating like that is an art. I would buy a second set in a heartbeat even though I have no need for them. The only reason I haven't is because I'd be taking a set away from someone who currently needs them. These are hands down the best headers available for a SBC in these cars. I feel lucky that I have a set.

I know a guy who is an extremely gifted fabricator. He builds headers all the time. To get him to make me a set would probably be 3k. Don designed a jig of some kind and that makes his ability to produce them unique. It also brings the price down.

these won't be available for ever, you snooze you loose!

 

@Dyno Don : Any way I can get this set re-coated, again ??



Pretty sure this will be the last time they come out of the engine bay. Just finally got the engine re-installed last week --> in NO hurry, but would at least need them returned before calendar spring 26' and need to get an idea what cost would be so I can prepare for it. This is pretty much the biggest "issue" I've got to figure out to complete the rebuild. ( well,.. need some new axle bearing too but that's another story ! )

LMK.

 

I'd reach out to JetHot or similar header companies

It may be easier to source new headers, depending on Don's supply

 

I'm sure you can find a local place to do it. I'm in CT and there's 3 places I know of that will do it in a 20 mile radius.

how long have you had them? I've had mine for 5 years and they look like new. I've always wondered how long it would take for them to corrode a little.

 

Pocket:

Ya' I could find someone else, but thru my years I've always preferred to work with a part supplier directly,.. they just seem to GAS more than a 3rd party. I don't want a new set - just want this set to get cleaned-up so I figured I'd try Don again first.

Firechicken82:

I got this set in 2012; They were brand new and after a little less than 3 years they began to look like the pic I just posted. ( Not as bad as they look now - but close. ) I sent them back to Don sometime in early/mid 2015 and they were returned too me looking good as new again by July 2015. This pic shows the recoated headers in May 2018 after 3 years re-installed: ( *MAYBE* driven a couple thousand miles a year.)





My wrenching / driving days are numbered & I HAD to pull that motor last fall (spun bearing ?) so now is the time to get them re-finished again. I live in RI, the car is garage kept (not heated), never driven in the rain, and hasn't been on the road since Summer 23'.

 

I am sure I could get it done for you but as was said it would cost less locally.
I will get a quote for you so you can compare.

 

Thanx Don,...I appreciate the effort !

 

Hi Don, Dave Dinwiddie here. have a set of airtube headers and non airtube also , and the exhaust pipe kit pipe for drivers side header angle isnt really lining up as i think it should. The whole kit was purchased from you way back under my sons name,Douglas , bought the non air tubes from TDS. am I missing something?? headers appear to be identical side by side exceppt for air tubes.Thanks! Dave 412-335-1040

 

Ouch...Not knocking Dyno Don or his headers but just feel like Jet Hot coating must just not be as good as it is hyped up to be. Your luck re-coating them makes me hesitate on getting my Thorley's re-coated in the future. Mine are degrading in the same area. Angered me that they ended up having some minor rust after 13 years and a lot of hard use. Even coated headers can run crazy hot. The 2nd image is the same headers from a go pro stuck under the engine cover at night on a pretty long hard uphill pull at the posted 75 mph speed limit. I was pulling a ~5,000 lbs trailer at the time.

 

Hey Dave, Did you ever get a solution for the headers not lining up with your Y-Pipe?

 

Crickets...have also emailed and called top down solutions , no response. it fair to say that i bought these a LONG time ago,health issue delays , but i expected i would have to pay for another pipe , didn't expect to be ghosted