I'm just curious what every who's making this kind of power running for exhaust, headers to tips? I'm building a Superrammed 383, and I think that topping out at 450 hp insn't completely unrealistic. My thinking on what I want my exhaust to be is a dual cat set of headers (currently single cat) which have 2.5" pipes for the cats I believe, and then to merge that into a 3.5" cat-back. I have to dump a bunch of money into the exhaust regardless, so if I'm gonna pay, I don't want it to restrict the motor at all, and I think the torque of the SR will be sufficient that I don't have to worry TOO much about losing a little low end torque. I'd like to hear what everyone has, and pictures are always welcome. Thank you, and sorry for the length.

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'89 Camaro RS 6cyl. auto, don't know how much longer I'll have it.
'90 Iroc TPI 305, 5 spd B&M Ripper shifter, hopefully I can rob a bank or something and get more
www.geocities.com/irocnroll90

 

When I was shopping around for an exhaust to replace the dual system I had, I asked that same question and the SLP single cat three inch I ended up getting was stated to handle upwards to five hundred horses no problem according to the techies at SLP. My two cents, though have no testing to back it up or anything, maybe they do if you're willing to call'em.

 

I was dynoed with my old Paxton at 421 rwhp, which was good for a 12.57. My best is a 12.04 with the Paxton and a 50 shot of nitrous.

My exhaust (at that time) consisted of dual cats, a custom made 3-inch intermediate pipe, a Magnaflow muffler and a pair of 4th gen Z28 tips.

Typically, I swap my exhaust for the track but didn't on my best run (too lazy). My track setup consists of a true 2-1/2" dual system with a crossover and a pair of Dynomax race mufflers. This system exits in front of both rear wheels.

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Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig): 12.57 @ 111 mph.
Former Paxton (6-psig) & former 50-hp nitrous: 12.04 @ 114 mph.
Current ATI D1SC (Initially 10-psig): Projecting high 11's.
Future ATI D1SC (15-psig): Gotta catch them pesky 26-psig boosted TTA's!!

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.

 

I run slp 1 3/4 headers, 3" all the way back with no cat and a flowmaster. My next thing is going to be longtubes with a Y pipe so I can drop the exhaust easily for the track. With my current setup plus a cat I went 12.9 with 2.73 and street tires.

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86 Iroc, 383 Ported and polished Sportsman II, stock ported TPI, #24 svo, custom chip, Slp 1 3/4, Comp Cams roller 218 224, 10" 2600 stall, Fairbanks 700r-4 W/superflow pro pump, 12.969@106.54 1.991 60', new times in spring
87 K30 Chevy P/U 355 TPI Crane Compucam, Ported heads TH400, Hooker headers and edelbrock mufflers (LOUD)no cats, 8" lift, 36" super swampers, 4.10 detroit lockers,

 

I have a fairly serious exhaust on my car. I have the hooker long tube super competition headers custom fabricated Y pipe going into a 4" pipe through a 4" dynomax race muffler and out the back on the one side. I also had a cut out fabricated with another 4" pipe kind of like the borla so I can bypass the muffler. Not cats on it. Sounds *****CRAZY*******!!!! Especially with a 6000RPM redline

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Karsten
86 IROC-ZZ4... too much to list.

 

Oh and for the tips they come out 4" chrome tips on each side I really like the 4" chrome tips especially since its not cheese since my whole exhaust is 4" unlike some ricers who have a acorn size exhaust pipe going into a 4" chrome tip

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Karsten
86 IROC-ZZ4... too much to list.