454 ss exhaust system

[SuperSpore]

Anyone aware of an exhaust system for 1991-1993 454 ss? It's a true dual exhaust.
Cat back system would be fine.

 

[Nad_Yvalhosert]

Factory spec is a y-pipe, single giant restrictive converter, single pipe into the muffler, then dual tail pipes.
Nobody is spending money on R&D for a rare, highly specialized 32 year old truck, and almost no catalog is publishing one either. Only modern/new trucks get that publicity.

If you want something besides OE replacement, its gonna be custom made. Or you could call Summit or Jegs.

 

[matthews454ss]

1990 had y-pipe with single converter
1991-93 had true dual exhaust

@Nad_Yvalhosert you are correct that if there ever was a bolt on exhaust kit its probably not being made anymore. Custom exhaust is your best option now.

 

[someotherguy]

1990 had y-pipe with single converter
1991-93 had true dual exhaust

@Nad_Yvalhosert you are correct that if there ever was a bolt on exhaust kit its probably not being made anymore. Custom exhaust is your best option now.

A detail I was unaware of, on differences of 90 vs. 91-93. Where's the O2 sensor on that setup, btw?

Richard

 

[SuperSpore]

In 91' the ss went to true dual exhaust and to a 4L80e.
Yeah, I'm painfully aware of the difficulty in finding aftermarket parts. Just looking for someone that's aware of something obscure.
There's information out there, and some parts, it's a matter of the info disappearing from the interwebs.

 

[someotherguy]

In 91' the ss went to true dual exhaust and to a 4L80e.
Yeah, I'm painfully aware of the difficulty in finding aftermarket parts. Just looking for someone that's aware of something obscure.
There's information out there, and some parts, it's a matter of the info disappearing from the interwebs.

Never know what you might run across. A few years ago I scored an NOS Corsa catback for the Silvy SS. Still in the dusty old GM-labeled box; it was an authorized accessory offered through the dealers. Guy bought it and never installed. It sounds way better on my truck than the Magnaflow I removed..

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Richard

 

[east302]

Here are the GM part numbers in case it helps track down something. C107 chassis with the L19, seems like it would be for the 454SS.

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Spare parts catalog Chevrolet EPC Online > nemigaparts.com

Parts catalogs. Spare parts catalog Chevrolet EPC Online.

nemigaparts.com

 

[arringtonkeith]

Any catback system for a 5.7 truck will work. I currently have an old Edelbrock system on mine.

 

[618 Syndicate]

Never know what you might run across. A few years ago I scored an NOS Corsa catback for the Silvy SS. Still in the dusty old GM-labeled box; it was an authorized accessory offered through the dealers. Guy bought it and never installed. It sounds way better on my truck than the Magnaflow I removed..

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Richard

I've got that exhaust on my Denali. Didn't know it was an authorized accessory. Sounds really good imo.

 

[MrPink]

Any catback system for a 5.7 truck will work. I currently have an old Edelbrock system on mine.

No it won't. Pipe diameter is different, 2.25-2.5" for the 5.0/5.7L trucks and 2.75" for the 7.4L and 6.5 Diesel. It may not seem like much, but it will effect performance.