Looking for a replacement for the Spintech muffler on my 3.5" Mufflex system. I'm currently running Dyno Don's headers with a Magnaflow 3" universal spun converter (59929) and the system is just too loud. I've read that some have swapped for a Dynomax Ultraflow (17224 or 17517?) but I've thought about pulling the entire system and trying something new. Any suggestions either way?

 

Anyone?

 

Magnaflow. Get one of the oval cased body ones not a bullet style. I'm running the 14in long 3in magnaflow on my 03 yukon and on my 5.3 swaped thirdgen. Haven't started the car yet but on my yukon its tame at idle and hwy speeds but comes alive under throttle.

 

How modded is your 305?

On my TPI 350, my Magnaflow bullet muffler just behind my Magnaflow muffler, with full tail pipes out the back, is really quiet at idle & cruise but wakes up under WOT but still not obnoxiously loud.

 

The car is an L98/auto with Dyno Don's shorties.

 

I am running the Magnaflow 12509? 3.5" muffler. Quiet just driving around but will roar somewhat when you nail it.

 

is the spintech/mufflex system for sale? ive been looking for one! thanks

 

Dude go get a 3.5 inch muffler for a diesel. They'll quiet it down a lot.