exhaust without cats - ZR-1 Net Registry Forums

WARP TEN · 07-20-2013

I am contemplating removing cats from my exhaust system. No emissions testing in Illinois for our Zs. I currently have headers, Corsa, and ceramic cats. I am aware of the performance gains and I know whatever exhaust system is in place will be louder. What I wondered about is does the exhaust smell bad on start up and later when hot? I have heard people say so but I have not experienced it. What is it, an excessively rich mixture on startup? Good, bad, not important? All opinions welcome -- Bob

07-20-2013	#1
WARP TEN Join Date: Apr 2007 Location: Lake Bluff, IL Posts: 2,040	exhaust without cats I am contemplating removing cats from my exhaust system. No emissions testing in Illinois for our Zs. I currently have headers, Corsa, and ceramic cats. I am aware of the performance gains and I know whatever exhaust system is in place will be louder. What I wondered about is does the exhaust smell bad on start up and later when hot? I have heard people say so but I have not experienced it. What is it, an excessively rich mixture on startup? Good, bad, not important? All opinions welcome -- 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"