As part of the upgrade that I'm considering, I'm looking at getting rid of the 55 galllon drum under my truck the dealer is calling the muffler. I would like to replace it with a FLOWMASTER 4", but only have the stock 3.5" exhaust.

Here's what I'd like to do:

Run the stock 3.5 to the inlet, but taper to 4" about 18" before the inlet. After the FLOWMASTER, run 4" to the tailpipe.

I want to do this until I'm over my financial challenges and can completely commit to a 4" exhaust. When I do, I still get to keep the 4" Flowmaster I just bought.

Will this work?

Thanks!

 

a flowmaster belongs nowhere near a turbocharged engine!!! if you can't see straight through it, you don't want it on your truck!!!

Forrest

 

REALLY???? WHY NOT?

Will it make EGT's skyrocket??

 

run just a 4" straight pipe you will like the sound alot better and the egts will be much better

 

turbos need as little backpressure as possible... flowmasters and other chambered style mufflers are designed to work with the exhaust pulse waves in the exhaust flow... there aren't any pulses in a turbocharged exhaust stream, so the plates and chambers create eddies and turbulence in the current that back up the exhaust...

Forrest

 

Another lesson learned without having to do it the "hard way"!!!

The reason I went to this configuration is because I was told it would increas HP. Evidently I was MISLED!!!

Straight pipe it is!!

Thanks guys!!

 

A muffler of any kind does not belong on a turbcharged diesel... You will love your straight pipe.