how do i replace my cats completely
Le Mans Master
Joined: Dec 2006
Posts: 5,139
Likes: 482
From: H-Town Texas
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
The conversion to a second O2 sensor is not unique to the Corvette either. It's due to the change in the computer generations. At least that's what my exhaust shop said.
Funny thing though....At the time I learned this, we had two cars with ODB2 and my ODB1 Corvette. If you looked at the tailpipes alone, you'd swear the vette had the lower emissions -- because the pipes weren't as black.
Intermediate
Joined: Jan 2011
Posts: 26
Likes: 0
From: San ANtonio Texas
Put on a pair of Walker 15039 (3") or 15038 (21/2") Cats and be legal. They flow better than your engine is capable of exceeding.
You need 2.2 CFM of flow per horsepower in order to not restrict flow. Remember this rule of thumb. Dual exhaust only has to handle half of that.
You need 2.2 CFM of flow per horsepower in order to not restrict flow. Remember this rule of thumb. Dual exhaust only has to handle half of that.
