Didn't use it on my blazer, but I used a hooker setup on my 86 fullsize pickup and the hooker headers sucked... Poor fitment and never noticed much improvement over the stock setup, just sounded better. On my 91 blazer I put a flowmaster catback setup on when the exhaust needed replaced, and love it. Sounds good, emissions legal and fit perfectly!!! The worst part was cutting off the old exhaust. $179 from summit 5 years ago, and still hasn't rusted hardly at all. Sounds good, and seems to run a bit better ( larger pipes and muffler). Go to tbichips.com he has a good section on improvements for the tbi setups and has suggestions that work. He's a good guy, and knows his stuff, he won't sell you something you don't need. I've also read some articles on people having better performance gains with a good flowing single exhaust setup than with duals, I think carcraft dis a dyno run on a mid 80's full size chevy pickup that they replaced the headers and dual exhaust with an emission legal single exhaust setup and if memory serves me it performed better on the dyno than the headers and duals. Just something to think about..
