Getting ready to do the Diamond Eye 4 inch muffler delete next weekend and wanted to know once I have it mounted and tacked do you guys recommend "re-tuning" anything on the intake side of the engine? Idle, fuel screw, timing, etc? I'm trying to do everything one time so I don't spend every off day re-fixing from the month before...

Where do you guys running these larger exhausts see the gains? EGT's, boost numbers, mileage, power, all of the above?

Cree

 

sound is the biggest thing

 

3-4 more pounds of boost, ~125* lower temps., faster spool, more noise.

 

I dropped egts 0ver 100f at WOT, lost 2psi of boost since there was less flow resistance. And it sounded better than the 3" staight pipe I had before.

 

Just finished putting it in the Diamond Eye 4 inch without no muffler and what a great kit. Took a couple hours to cut out the old system and strap in the new. Sounds great and no drone at highway speeds. Spools quicker and runs cooler. Best $266 I've spent yet...

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Ummm ... that's "with no muffler"...

 

Here's my before and after.