Removing muffler

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Oct 7, 2014 | 08:54 PM

#11

Jbrew

98 F150 5.4L E40D/4R100

Joined: Nov 2006

Posts: 28,541

Likes: 7,642

From: MI

If you want TD's with the factory tune, reduce down after an x pipe, right after the Y. Make it either 2-2 1/8" diam pipe. all the way back to whichever tip you like.

Oct 7, 2014 | 09:02 PM

#12

Jbrew

98 F150 5.4L E40D/4R100

Joined: Nov 2006

Posts: 28,541

Likes: 7,642

From: MI

If your into doing the Math, -

http://www.exhaustvideos.com/faq/how...diameter/#easy

Oct 7, 2014 | 09:23 PM

#13

Jbrew

98 F150 5.4L E40D/4R100

Joined: Nov 2006

Posts: 28,541

Likes: 7,642

From: MI

BTW- If your keeping all 4 cats, the best dyno'ed system from stock was the 3" cat back systems with one of the high flow straight thru mufflers mentioned.

Oct 7, 2014 | 11:38 PM

#14

Jefk

Senior Member

Joined: Apr 2014

Posts: 765

Likes: 13

From: Between a rock and a wierd place, TX

Quote:

Originally Posted by Jbrew

BTW- If your keeping all 4 cats, the best dyno'ed system from stock was the 3" cat back systems with one of the high flow straight thru mufflers mentioned.

Dynomax Bullet

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