99 Blazer, 4.3l
 

I need to replace a cat on a 99 Blazer, what would the inlet/outlet sizes be? Is that a 3"?? I can't find any information anywhere on the pipe size and want to buy one on ebay..

Thanks..

RE: 99 Blazer, 4.3l
 

if its stock pipe it wont be 3" but the fastest way to find out is to call your local mufler place and ask them what size it would be then u can look on ebay for one.

RE: 99 Blazer, 4.3l
 

Thanks for the reply, I found it's a 2.5, simple way is just to measure the thing.. :)

Anyway, the boss is happy because the stock unit was 600 bucks or some such garbage, I just saved him some major money. Not that he'll care in the long run. He's a boss, they're like that..

Thanks again..

RE: 99 Blazer, 4.3l
 

no prob always good to keep the boss happy. i was under mine yesterday cuse the tail pipe was coming lose dam that muffler is huge hope i dont have to replace it anytime soon.

RE: 99 Blazer, 4.3l
 

hey did your blazer run like crap & the check engine light come on when you took off the cat? is there A way to bypass it from doing this?