California cat
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
LEAVE it be !!! There is very little HP gains on a stockish bolt on engine when installing hi flow cats---Same goes for rempoving them completely-- Hi flows maybe 2-5 RWHP and removal maybe 5-6 RWHP-- Not worth the effort and the $$$ in my opinion--You'd be better off spending your money elsewhere and won't have to worry about the smog police--
Melting Slicks
Joined: Jun 2012
Posts: 3,163
Likes: 6
From: Oceanside California
LEAVE it be !!! There is very little HP gains on a stockish bolt on engine when installing hi flow cats---Same goes for rempoving them completely-- Hi flows maybe 2-5 RWHP and removal maybe 5-6 RWHP-- Not worth the effort and the $$$ in my opinion--You'd be better off spending your money elsewhere and won't have to worry about the smog police--
Thread Starter
Racer
Joined: May 2009
Posts: 340
Likes: 0
From: Santa Rosa Calif
I am doing mods this winter. ls6 intake, ported throttle body, #32 injectors, B$B smog legal short tubes, AFR 1510 smog legal heads and Comp Cam 219/227, 571/578, LSA 114.Then a custom tune. I think good cats would help this set up. O no I said short headers,I know long tubes are better. But the shorts will definitely out flow stock manifolds.
Melting Slicks
Joined: Jun 2012
Posts: 3,163
Likes: 6
From: Oceanside California
I am doing mods this winter. ls6 intake, ported throttle body, #32 injectors, B$B smog legal short tubes, AFR 1510 smog legal heads and Comp Cam 219/227, 571/578, LSA 114.Then a custom tune. I think good cats would help this set up. O no I said short headers,I know long tubes are better. But the shorts will definitely out flow stock manifolds.
Thread Starter
Racer
Joined: May 2009
Posts: 340
Likes: 0
From: Santa Rosa Calif
The guys that are going to tune my set up wanted me to get the part number and or grind number to make sure its right for me thanks.Is the idle lumpy or fairly smooth and have you heard one idle yourself. Thanks
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