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WARP TEN · 03-17-2015

I currently run without cats as Illinois does not require emissions testing. I have SW headers, a stock 95 exhaust system and electric cutouts just before the mufflers (some pix in my albums). Another reason I did not want cats if that with the length of the SW headers I would have had to cut up the front part of my stock exhaust system and I did not want to do that. When I had my Corsa on the car I did use I believe Random Tech cats. You are correct that without cats your car exhaust will smell a bit--kind of like they did in the 60s and 70s. Not too bad and usually just on cold start up. The biggest advantage to cats (other than for the environment) is that they soften exhaust noise. I would say cats can reduce exhaust sound by as much as 20%. Yet they only cost a couple of horsepower. --Bob

03-17-2015	#2
WARP TEN Join Date: Apr 2007 Location: Lake Bluff, IL Posts: 2,145	Re: Cats or No Cats??? I currently run without cats as Illinois does not require emissions testing. I have SW headers, a stock 95 exhaust system and electric cutouts just before the mufflers (some pix in my albums). Another reason I did not want cats if that with the length of the SW headers I would have had to cut up the front part of my stock exhaust system and I did not want to do that. When I had my Corsa on the car I did use I believe Random Tech cats. You are correct that without cats your car exhaust will smell a bit--kind of like they did in the 60s and 70s. Not too bad and usually just on cold start up. The biggest advantage to cats (other than for the environment) is that they soften exhaust noise. I would say cats can reduce exhaust sound by as much as 20%. Yet they only cost a couple of horsepower. --Bob __________________ 2016 Long Beach Red Z06 #10281 "POPS Z" 1995 Polo Green #409 "WARP TEN"--Haibeck 350/510 package, 4.10s, Hurst, Stock Exhaust with QTP Cutouts --Sold but still running strong 1993 Quasar Blue #161 "HIL KING" --Sold but still running strong, now with more than 120,000 miles 1967 Marlboro Maroon/Saddle Corvette Coupe 300 hp/4-spd --Sold a long time ago ZR-1 Net Registry Founding Member #95 NCM Lifetime Member Favorite Quote--Attributed to Mickey Thompson: "Too Much Horsepower is Almost Enough"