[IRA51]

if you remove both cats and buy a pair of sim's and screw them into the bung where the downstream O2's were you will have no mil a nice sound and more power . just don't expect to pass emission inspection. also some times if you put some Seafoam or injecter cleaner in the tank the cat gets clean and the mil go's out,not always but sometimes. ran my 2000 Z28 with a 382 stroker,long tubes and a hacked computer with sim's for 4 years and never saw a mil the whole time ,they will run just fine without cats . Summit used to sell simulaters . but shame on you for wanting to run catless and killing our ozone layer.