High flow cat or stock replacement
08-26-2006, 07:42 PM
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High flow cat or stock replacement Does a stock replacement cat loose very much horsepower over a high flow one.By stock replacement I mean one that any regular muffler shop would sell.I dont know if I should just stick a stock one on or order the high flow.What would you recommend?
08-26-2006, 08:50 PM
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i have a question also....what do i need to do to remove my cat on my car? just cut it off and put a straight pipe there and thats it? or do i have to do something else also so that way the light doesnt come on
08-26-2006, 08:52 PM
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get the cheapest cat, have them put flanges on it. then have them make you a 3in. pipe with flanges on it. have some more put on your existig exhuast and then switch between the two. 
i cruise around with the straight pipe and put on the cat only when i have to get it smogged. i even had them put a cut-out on the straight pipe so i can uncap it whenever i go to the track. but if you dont like that idea...get the high flow like lostoceanz63 said.
i cruise around with the straight pipe and put on the cat only when i have to get it smogged. i even had them put a cut-out on the straight pipe so i can uncap it whenever i go to the track. but if you dont like that idea...get the high flow like lostoceanz63 said.
08-26-2006, 08:55 PM
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just put a straight pipe in there. you dont need anything cause you dont have a rear o2 sensor. but it would help to get a tune and maybe even a lt4 knock module. i started getting a little knock retard after i put the ORP in. 
you dont need anything cause you dont have a rear o2 sensor. but it would help to get a tune and maybe even a lt4 knock module. i started getting a little knock retard after i put the ORP in.
08-26-2006, 09:03 PM
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Check ebay, do a search for ls1 converter and in the stores section theres a seller with 3" high flow round style cats for like 43 bucks. I think they are flowmaster.
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08-27-2006, 01:07 PM
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Originally Posted by LTSpeed
I thought it is more like 100-150hp? lol
