Quote:
Originally Posted by King Nothing  i'm not sure why everybody thinks you need a Y-pipe to pass smog . . . if you don't move the cats from the original position you're all good!!!!! i have 3" true duals and my manifolds and cats, just passed smog visual and tailpipe but yes that letter refers to shorty headers |
F-body up to 2000 had y-pipe cats. In 2000 they switched to the ones that come right off the manifold. You can probably get away with putting the 00+ cats on a 98 or 99 car, but LT1s get screwed either way.