Stock muffler

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May 8, 2012 | 08:20 PM

Major Marvin

Thread Starter

Elder User

Joined: Sep 2010

Posts: 777

Likes: 6

From: Florida

Stock muffler

Well my cat fell off and the 3" downpipe was installed before I bought the truck. Is the stock muffler restrictive?

May 8, 2012 | 08:30 PM

redman84

Cargo Master

Joined: Feb 2010

Posts: 2,526

Likes: 6

From: College Station, TX

It's a straight through style. There's a pic of the inside floating around here somewhere.

May 8, 2012 | 08:41 PM

fordpride

Post Fiend

Joined: Dec 2009

Posts: 15,505

Likes: 18

From: Livoina,La

You can leave it be if you want

May 8, 2012 | 10:51 PM

oldbird1965

Fleet Owner

Joined: Aug 2004

Posts: 20,419

Likes: 197

From: AZ

In my opinion its still restrictive. The exhaust will swirl around in there causing a little back pressure. I've done it both ways, EGT's were a little higher with it also.

May 9, 2012 | 01:26 PM

Major Marvin

Thread Starter

Elder User

Joined: Sep 2010

Posts: 777

Likes: 6

From: Florida

Thanks guys, I'm not pulling or carrying any loads. I do drive 75 mph sometimes though. I guess I'll let it be and save a little money for now.

May 9, 2012 | 01:29 PM

DIYMechanic

Post Fiend

Joined: Dec 2010

Posts: 10,121

Likes: 3

From: Orrville, Ohio

I've done it both ways, straight pipe and stock system and I can't tell any difference performance wise either way. The turbo whistle is nice without the muffler, but it is a much quieter ride with it on there. I'm running a 3" DP into no cat, and the balance of the stock system right now. It sounds pretty decent IMO.