Downpipe?
Thread Starter
Joined: Mar 2006
Posts: 44
Downpipe?
So I'm looking at replacing the entire exhaust system on a 95 GST. I was curious about the legality of aftermarket downpipes. Since most of the ones that I've seen replace the catalytic convertor, wouldn't they be illegal for street use? I would like to have a good 2 1/2 if not 3 inch exhaust all the way back, but I don't want to have to deal with failing inspections for not having a convertor. Any insight would be appreciated!
Joined: Apr 2006
Posts: 42
RE: Downpipe?
ok i had i 92 gsx and i also wen with the down pipe i would recomend the APEXi N1 Downpipe but theres some things u should know like u said it would replace the factory catalytic
but with the removel of the CAT and install of the larger A'PEXi piping, the turbo will be able to push out mutch more free flowing exhaust i was hitting 17psi before hitting the factory fuel cut but i then installed a HKS Fuel cut Defencer to fix the problem.
HP TQ
with a base line of 183hp 198
1. APEXi Downpipe 219hp 228 (thats a gain of 36hp and 30TQ)
2. HKS FCD 267hp 252 (thats a gain of 47hp and 24TQ) [i went the extra step and also put in a Holley 255lph fuel pump]
3.Holly Fuel Pump 290hp 278 (thats a gain of 23hp and 25TQ)
F. Final gains 106hp 79TQ
and all of this should be about 600$ in parts and can be installed in about 2-4 hours and all of these specs are baked up buy a dynomometer thats almost 300hp and still on the stock turbo;-)
but with the removel of the CAT and install of the larger A'PEXi piping, the turbo will be able to push out mutch more free flowing exhaust i was hitting 17psi before hitting the factory fuel cut but i then installed a HKS Fuel cut Defencer to fix the problem.
HP TQ
with a base line of 183hp 198
1. APEXi Downpipe 219hp 228 (thats a gain of 36hp and 30TQ)
2. HKS FCD 267hp 252 (thats a gain of 47hp and 24TQ) [i went the extra step and also put in a Holley 255lph fuel pump]
3.Holly Fuel Pump 290hp 278 (thats a gain of 23hp and 25TQ)
F. Final gains 106hp 79TQ
and all of this should be about 600$ in parts and can be installed in about 2-4 hours and all of these specs are baked up buy a dynomometer thats almost 300hp and still on the stock turbo;-)
Thread Starter
Joined: Mar 2006
Posts: 44
RE: Downpipe?
ORIGINAL: SmokeShow
ok i had i 92 gsx and i also wen with the down pipe i would recomend the APEXi N1 Downpipe but theres some things u should know like u said it would replace the factory catalytic
but with the removel of the CAT and install of the larger A'PEXi piping, the turbo will be able to push out mutch more free flowing exhaust i was hitting 17psi before hitting the factory fuel cut but i then installed a HKS Fuel cut Defencer to fix the problem.
HP TQ
with a base line of 183hp 198
1. APEXi Downpipe 219hp 228 (thats a gain of 36hp and 30TQ)
2. HKS FCD 267hp 252 (thats a gain of 47hp and 24TQ) [i went the extra step and also put in a Holley 255lph fuel pump]
3.Holly Fuel Pump 290hp 278 (thats a gain of 23hp and 25TQ)
F. Final gains 106hp 79TQ
and all of this should be about 600$ in parts and can be installed in about 2-4 hours and all of these specs are baked up buy a dynomometer thats almost 300hp and still on the stock turbo;-)
ok i had i 92 gsx and i also wen with the down pipe i would recomend the APEXi N1 Downpipe but theres some things u should know like u said it would replace the factory catalytic
but with the removel of the CAT and install of the larger A'PEXi piping, the turbo will be able to push out mutch more free flowing exhaust i was hitting 17psi before hitting the factory fuel cut but i then installed a HKS Fuel cut Defencer to fix the problem.
HP TQ
with a base line of 183hp 198
1. APEXi Downpipe 219hp 228 (thats a gain of 36hp and 30TQ)
2. HKS FCD 267hp 252 (thats a gain of 47hp and 24TQ) [i went the extra step and also put in a Holley 255lph fuel pump]
3.Holly Fuel Pump 290hp 278 (thats a gain of 23hp and 25TQ)
F. Final gains 106hp 79TQ
and all of this should be about 600$ in parts and can be installed in about 2-4 hours and all of these specs are baked up buy a dynomometer thats almost 300hp and still on the stock turbo;-)
Senior Member
Joined: May 2005
Posts: 12,084
RE: Downpipe?
that is not alot of power really that is very streetable. 300WHP is not bad at all to drive. I do it daily but again I am AWD so its easier my buddies GSt is about the same and he has no trouble driveing it
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