MikeH

iTrader: (10)

I would like to hear some input from you guys.

I just installed a set of Hotckiss subframe connectors. I started to notice a SLIGHT ripple in the sail panel on the drivers side.

Anyways, I cut one of the Exhaust pipes because it was in the way. Was Getting ready to take it in and have a new pipe welded up. Had to start her up to hear the open exhaust even if it was just on side. There was a Major difference in the sound and responce of the car. Its louder i know..But It loped and reved so much quicker. So now Ive got to take it out for a spin. Major difference in power, I know not to always trust the buttometer. But sometimes you know its right!

I need a better system from the headers back. Currently the car has.. SLP 1 3/4 headers for dual cats. Going to a flowmaster dual 2.5 to 3" "y-pipe. No cats, to a 3" dynomax catback with the 2otl pipes. This is supposed to be one of the better flowing 3"catbacks.

My question is What should i run? What are you guys running on these large motors? I want to do it right this time.

IM thinking of sticking with a single pipe. Maybe a 3.5 or 4" mufflex system. Duals would be great but these cars suck for exhaust clearance.

So who has be there done that? Any thoughts?


Thanks,
Mike

EvilCartman

iTrader: (1)

Go for the sewer pipe of single 4 inch

CraZ-28

Yeah, that's what I'm thinking. I don't think it so much the headers but more like everything from the headers back. In this case going with the 4 inch would probably be your best bet. Then possibly some high flow cats and you should be good to go. Also, running the 4 inch system is equivilant to 3 inch duals. (FYI)

firebirdjosh

iTrader: (1)

Dual 3"s can actually flow a bit more.

Orr89RocZ

iTrader: (20)

dual 3's or 4inch single

urbanhunter44

iTrader: (3)

quite honestly on that car I'd be running dual 3" pipes.

red406

iTrader: (4)

Mike

This is my set up for an identical ride like yours. This car has a 400 sb and hotchkis sfc. This 400 should have about 520 horsepower. It sounds great. It was alot of work, but it was well worth it.

https://www.thirdgen.org/techbb2/sho...hlight=notches

mw66nova

iTrader: (13)

3" true duals with h or x pipe...

PhAnToMs

iTrader: (2)

well weight of the 3 inch duals is alot more than single 4 inch so if weight i s aconsern go with the single pipe

LilJayV10

iTrader: (5)

I am planning on going with 1 3/4 SLP shorties and a custom y pipe into a 4 inch mufflex for my 406.

I am looking for some 1 3/4 SLP's right now without air tubes.

Jason

NOSFEDGTA

I owuld go with hooker 2210's into a custom y-pipe. If you are interested I have a custom y for the hookers. I had it made when I was running the single exhaust. I ran in the 9's on my 406 with this setup. i had the 2210's the y-pipe, then inot a bullett muffler...let me know if you are interested..

MikeH

iTrader: (10)

Thanks for the input guys i really appreciate it!

Red406.. thats one awsome setup you have there i hope to have something like that one day!

LilJayV10..I know someone that has a set of SLPs for sale. But they are 1 5/8s, there also jethot coated, with no air tubes. I can send you his email if your interested.

Drew i sent you an email. Thanks!


Well after talking with others and searching more. I dont think the 3" pipe is my biggest problem. Not to say that a larger pipe wouldnt help. Because im positive it would add some power. Along with some long tubes.

Its the muffler thats the biggest restriction! You guys have got to see this thing! When it goes into the muffler it necks down. From 3" to less then 2.5," i will see if i can post pics of it later.

Just doesnt make sence to me why they did that.

Anyways, i ran across an SLP 2OLT CAT BACK for sale! All stainless very nice the price was right and i couldnt pass it up. Best thing is its a straight thru design and stays a full 3" into the muffler. IM gonna polish the tips good and install it.

Mike

MikeH

iTrader: (10)

I snapped a few pics...there must of been alot of back pressure. It blew the inside baffle away from the case.

MikeH

iTrader: (10)

The SLP system looks like its 3" all the way thru. I tried to get the pipe off so i could get a look thru it. But its dimpled and not wanting to come apart. Anyone have a pic of the inside.

IM having second thoughts about using this. I really like this SLP system though its very well made.

But..That 4" mufflex system is looking really good about now.

EvilCartman

iTrader: (1)

Get the 4 inch and you'll be happy

1989GTATransAm

iTrader: (3)

The 400 will like the 4" Mufflex system a lot better.

MikeH

iTrader: (10)

Thanks to all who posted...I just wanted to follow up on this post for those who might be interested.

I did end up installing the SLP system. And i love it! The sound is so much cleaner then the dynomax 2otl. Its not to loud either, just right, has a muscle car sound very clean not raspy. Its stainless so should last a good long time. And the power above 4000 is much better. I dont have anything to go buy just that it pulls much better in the 4000 to 6000 range then before. I would recommend this system to anyone.

I did get a chance to polish the tail pipes before installing it. And they came out great looks really good next to the black paint. Has a euro look to it, not cheap or tacky. Best thing is the guy doing the exhaust work. Was really cool and welded my subframes in after i bolted them in. Free of charge..even stiched them along the pinch weld.

faulball67

iTrader: (2)

Just wondering how anyone would think a 4" single would flow as well as 3" duals? The volume is obviously larger for dual 3" pipes. It can be calculated using this formula. Volume(V)=(PI)x(radius squared)x(lenth). So given an equal sections of pipe, a cylinder 4" in diameter and 12" long has a volume of approximately 150.8". A cylinder 3" in diameter and 12" long has a volume of approximately 84.8". Then multiply that by 2 for duals and you get a total volume of 169.6". That's a volume of 18.8" more. Now figure if both setups are the same lenth. Let's say 8 feet of pipe total from the headers to the tip. The volume for the 4" setup would be 904.8". For the 3" setup the volume would be 1017.9". That's 113.1". Just a thought. Of course actual lenth of the system would vary due to actual length but you get the general idea. The less pipe you have to flow through the better. The best bet would be to go with cutouts right behind the headers so you can open it up when you want.

EvilCartman

iTrader: (1)

This is why I recommended the single 4" since duals would screw up the ground clearance. Never said a single 4" would be better power wise instead of dual 3

LilJayV10

iTrader: (5)

I bought a set of 1 3/4 SLP's last week and got them last night, they look really good. The guy I bought them from runs high 10's on motor and low 10's on 150 shot. He used the headers y pipe from SLP and a 4 inch mufflex with a flowmuff. if he can run 10's with this system, i know I can run mid 11's. It's cars like that make me wonder why people say you can't go fast on single exhaust.

MikeH

iTrader: (10)

The SLPs are a well made header, they have some problems like any other aftermarket part. On my car Once the flange took a set to my heads. I havent had any problems with gaskets, or loose bolts. I have had Edelbrocks, hooker shorties, and SLPs. Ive liked them all, but these are the best design IMO. They are built to last with little problems.

My car is a totaly different animal now. Its always been a torque monster, but i got a nice horsepower increase. It flys thru the 4000/6000 range now. Where before it was kinda lazy. Dynomax has some of the best mufflers out there. But you can only push so much exhaust thru stock application muffler. To many damn bafflles/chambers in that thing.

Yeah that 4" should take you where you want to go. I was looking for the same before i ran across the SLP system. People have went 11s on a 3" system, there is always cutouts.

For an allout track car, the long tubes might be better. But for what i have the SLPs work great. And once you figure out where you need to be. To pull the plugs, they arent bad to get to.

abray1

I just installed 2210s and dual 3 y pipe into a 4 mid pipe running over the axle into a spintech muffler 4 in and dual 3 out. My 406 made 401 hp and 511 tq at the rear wheels and is very quiet and sounds great. In fact it is the best sounding exhaust I have ever heard. I have one spot that hangs a little low by the left side of the cross member.

brutalform

I know this thread is over 2 months old, but, I just recieved my Mufflex 4 inch system today. I currently run 11.70s, and its through a single 3 inch Flowmaster cat back, with a Mufflex "Y" and 2210s. I want to be realistic, by saying, I hope to pick up a tenth, or two. I chose the Magnaflow option, over the FM, or Spintech. This was for $40.00 more. I decided that I would not use a Flowmaster again, as I already picked up one tenth, and one MPH, by replacing the 3 inch FM muffler, with a Dynomax UltraFlow muffler on my existing 3 incher. I cant wait to put it on, but I have my entire kitchen under construction. Hopefully, I MIGHT be able to make the track this Friday night.

1989GTATransAm

iTrader: (3)

I have the 3.5" Mufflex system with the Magnaflow muffler. I'm very pleased with it. It also on the quiet side which I like.

MikeH

iTrader: (10)

Hi i would be very interested in knowing how you do at the track. Please post how you do.

brutalform

The car picked up 2 tenths, and 3 MPH. 11.60@118. There is more in it too. The track had problems with the PortaTree, and time shots were cut short. I also have more prom tuning to do.

The sound is a bit louder with the 4", and the Magnaflow muffler, but it is a FANTASTIC sound, and I just love it.

If I can get some clips up, I will.

1FastZ

For those of you running the mufflex system, are you running shorty headers?

MikeH

iTrader: (10)

Awesome thats a good gain, i would love to hear it. Nice et and mph as well.

good thing i havent fully welded my 3" system yet. Damn..I should have listened and went with the 4" in the first place. IM running SLP 1 3/4 shorties..I would like to keep them and the flowmaster y-pipe. But im thinking about using the mufflex 4" for sure.

MikeH

iTrader: (10)

sorry i cant remember but did you ever post a sound clip from it?

MikeH

iTrader: (10)

Hows the new exhuast coming? make any progress with the 4" system yet?

MikeH

iTrader: (10)

Ran across this post while searching a topic. Well looks like im swaping out the 3" SLP system. Going with a 3.5 mufflex system with the spintech muffler. I ran across a good(thanks brit)deal on it or i might i have gotten the 4".

Anyways hope the spintech flows well. I think its a chambered muffler so thats not good for flow. Everyone seems to love the sound. I may end up swapping it out for a magnaflow later on who knows.

Will update when its installed for those interested.

FJA

Just wondering if anyone has a good used y pipe for Hooker 2210's.

Thanks Frank

likeenz24

iTrader: (2)

[QUOTE=FJA;3157679]Just wondering if anyone has a good used y pipe for Hooker 2210's.

Thanks Frank[/QUOTE I have one that I bought off of here...I was told it was a Mufflex, but its not. It stainless front pipe that are 3". The y-pipe is 3.5" outlet. It is in decent condition, but has been clearanced to clear stock crossmember. It would nto fit my T-56 crossmember. Will fit stock type crossmember. I gave a ton for it, but will take 100.00 + shipping...