[RacerX661]

Hey guy's i was wondering if i added a exhaust cutout in my Harman Movtive midpipe would i need to tune it??
I know to get hte most power of out it i will. but i dont want to tune it to keep my warranty. so will the cutout hurt anything without a tune??

 

[jimmyp]

Stock ecu will adjust up 20% so I would think not

 

[RacerX661]

Cool! Has anyone Put a cutout on a GT-R??

 

[Jeremy GT-R]

I've ran 8" turn downs off catless down pipes. Sounds crazy as shit, but it's very loud!

.

 

[RacerX661]

Got any videos?? Or dynos??

 

[GTR-Jack]

i had it to... crazy loud and no vids sorry

 

[RacerX661]

Jack did you need to tune it?? Or retune if you already had a tune

 

[GTR-Jack]

no i had 2.75 cobb intakes and i did the cut out in the aam cat less mid pipe so i could take it out. to be honest it made me faster also. i ran it open all the time so i guess the car got used to it and adjusted to it. and no tune no tune at all

 

[RacerX661]

Awesome thanks for the info! What cutout did you use? QTP?

 

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Attached are the dump pipes I made, they connect right to the downpipes.

They are LOUD. They dump right below the console. The entire car resonates from the noise. Most of the performance gain is from the reduced weight.

Here is a GoPro with them on from the windshield.

 

[Mr.nissan]

i have qtp on my muscle car loud as hell really cool but the door that opens them up get warped from the heat an they leak so for gtr