I know it's been discussed but this one might be a little different. Currently i have a Dynomax Superturbo cat back with a 3" Tip. I'm interested in a set of duals, rather than coming out with big stainless tips, the exhaust cuts off underneath the truck, much like a one in two out just without the exhaust coming out the back, it's tucked away.
It's a 4 door 4.3l vortec, 97 Lt if any of the o2 sensors or maf sensors are in different positions.

Their is a custom shop in town but i was wondering if i could get a kit rather than taking the extra cost of having one off custom work done.

 

its always been my understanding no one likes to do duals on the blazers because of the fuel tank but I have seen it done. I'm 99% sure there's no dual kit but it can be done custom

 

IIRC duals are easier on the 4 doors. The 2 doors are to squished near the back that its hard to snake the piping through the axle and tank plus other stuffs in the way.

 

If the exhaust isn't seen, no point in duals unless you like to crawl under it to look. You can get the same sound from a properly sized single exhaust, just cut it off before the bumper so it's hidden. I'd go 2.5" from the y-pipe all the way back, any smaller is restrictive and 3" is too much for a stock V6.