eliminating converter-by adding straigt pipe
Thread Starter
Joined: Apr 2004
Posts: 63
Likes: 0
From: nw indiana
Car: 91 Z28
Engine: 383-Carb
Transmission: TH400/3500 Stall
Axle/Gears: 3.73
eliminating converter-by adding straigt pipe
i live in indiana,the emisiion laws are supposed to change.can i replace the catalitic converter w/a straight pipe?will the ecm log codes & will there be any performance problems?
thanks
chuck
p.s.what other mos will i
or do i have to make& can i
expect hp increaces?
thanks
chuck
p.s.what other mos will i
or do i have to make& can i
expect hp increaces?
Supreme Member
Joined: Mar 2001
Posts: 6,577
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
You sure can.
If you want to make it easy on yourself to put the cat back on, y ou can flange everything like I did. It makes putting the cat in, and easy 10 minute job.
If you want to make it easy on yourself to put the cat back on, y ou can flange everything like I did. It makes putting the cat in, and easy 10 minute job.
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Yes, you can, for "off-road use only".
It's a violation of Federal law to modify emissions systems with non-certified replacement parts or to make inoperative such emissions systems for vehicles operated on public streets, roads, highways and by-ways.
(Just making sure the "truth" is given, along with all the other advice you're bound to get on this thread.)
It's a violation of Federal law to modify emissions systems with non-certified replacement parts or to make inoperative such emissions systems for vehicles operated on public streets, roads, highways and by-ways.
(Just making sure the "truth" is given, along with all the other advice you're bound to get on this thread.)
Member
Joined: Apr 2004
Posts: 193
Likes: 0
From: G-Wood, SC
Car: 2 1988 GTAs
Engine: 5.0 and 5.7
Transmission: 700R4
Axle/Gears: 3.27 posi's in both
If any shop does it for you they are breaking the law. If you do it yourself you'll be ok until they start doing inspections again. EPA fines shops $2500 for removing a cat. I took mine off myself and ran a cutom made set up I built myself. As long as they don't do emissions testing here ever again I'll be fine.
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