I;m wanting to change my exhaust on my stock 2001.4in or would I benefit 5in? I'll do air filter mod too,any mods I doo will be for milage really have enough power for what I do.I also don't want it to be horribly loud.

 

Your stock exhaust is 3.5" with lots of kinks. The only difference between 4" and 5" is that the 5" will give you a deeper exhaust tone.

Luke

 

4 inch will be fine.

 

4in is all you need

 

5 in is LOUD!!!!!!!!!!! make sure to get a muffler if you tow the drone is killer

 

5 in sounds great on trucks with manual trans, on auto's it sounds like garbage, when I ran a 5 I had to remove my spare tire for clearance, so keep that it mind.

 

5in is good i think just make sure you get muffler, mines is really loud with out

 

i just got rid of my 4". It was a muffler delete is all so it was only four inch from where the muffler was back. It was loud and did not sound very clean. i just got 5" with a 4" down pipe after my exhaust brake and it sounds much cleaner. The 5 does have a muffler but like most diesel mufflers its straight through just there to get rid of the pop and drone. i should have done 5 from the begining. Helps a bit with EGT's too. I would say go five inch and be done. Mine was 700$ installed, had to cut it up for the banks brake.

 

$700^^^ man what kit did you get mine was 400 installed! Any ways Im planing on getting a muffler some time soon for it... And its sounds great on my auto

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also I got to keep my full size spare with my 5 inch setup

 

5" sounds so much better, I made my own 4" (because I'm cheap) and it dumps out before the rear wheels on pass. side without a muffler..... if I have nothing else I have the loudest Cummins around