Just put new exhaust on my blazer,
1, have headers , 2 1/2 inch pipe, moroso spiral flows, no h pipe , just over the back axle , 3 inch x 18 inch long tips.
Sounds like a drag car from idle to any rpm you choose to be at. So that was getting a bit old on the highway and attracted to much attention up in the hills so I needed to tone it down a bit.
2, same headers , 2 1/2 pipe, borla pro xs mufflers , added an H pipe , just over the back axle , reused same tips.
Now its way quieter and idle and at highway speed but still sounds tuff when you are on it. Has a tick of drone at low rpm cruise but not bad.
The H pipe is just past the t-case at a 45 degree angle above the drive shaft.
My engine is a new 357 horse 350 with vortec heads and 215/223 duration , 473 lift , 108 lsa , hyd. roller cam and 9 to1 compression. It sounds a lot more tame everywhere , (H pipe and a packing muffler vs. a chamber muffler) but as far as performance goes there is no seat of the pants gain at all that I can feel.