True Dual Exhaust for a stock 97 Blazer

[rockgitarplaya]

I want to start doing some upgrades to my blazer. i want to start with a true dual exhaust kit. but i cant find one. can someone point me in the right direction. it's a 97 4 door 4.3 V6.

thanks

[Blazing Rice]

A true dual is not practicle, the 4.3 doesn't have enough displacement for it to be truely benficial. You would be better off with a single exhaust and a dual outlet muffler is you have the space available.

[JoulesWinfield]

How is dual exhaust related to displacement?

My 3.2 liter inline 6 on my M3 has duals all the way back. It actually came from the factory with duals back to a single exit muffler. (Which I later replaced with a dual muffler on the same side.)

I think the real delemma is how to get the O2 sensor into the system properly. On most OBDII vehicles with twin pipes, there are twin cats and a total of 4 O2 sensors.

The moral of the story is this:
1. Large dual pipes will actually result in a loss of power due to lack of back pressure.

2. Operation of the Engine management system will be compromised. Also resulting in power/efficency loss.

3. Its much better to run a Y pipe from the manifolds through the cat to a dual exit muffler. Or just get a nice single muffler and pretend like thats what you really wanted anyways.

[Nazdreg]

This can work well. I put a Flowmaster 50 series dual on mine. It works great and sounds great, coupled with the intake and TBS and MSD. I can pretty much smoke the tires when I want.