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Discussion Starter · #1 ·
Anybody know what kind of hp gains (over stock) can be seen with a 4" MBRP turbo back exhaust? Is it different with a tune (ie. Predator 65 hp)?
 

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Not sure yet but I just ordered both. I'm thinking between the two, I should gain 3mpg. After I get them installed, I'll report back.
 

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I've heard anywhere from 10-30 hp, i haven't checked it though. for me the purpose of the exhaust with a tuner in not so much hp gain, but lower egts with a programmer.
 

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On an LMM....

Stock RWHP 300 RWTQ 525.............DPF, cat and muffler in place...
With Exhaust RWHP 317 RWTQ 567.....No cat, DPF and with a muffler.

17hp and 42 lb/ft torque.

One of our vendors did it recently.
 

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On an LMM....

Stock RWHP 300 RWTQ 525.............DPF, cat and muffler in place...
With Exhaust RWHP 317 RWTQ 567.....No cat, DPF and with a muffler.

17hp and 42 lb/ft torque.

One of our vendors did it recently.

Wow, those are some really good numbers. Was that the gain without any type of additional HP programming?
Very impressive if you gain that much hp and especially 42 ft lbs by just takin all that exhaust stuff off.

Thanks Nick. Great info.
 

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No tuning, just exhaust work Joe...

Like I said, that was on an LMM....

Taking off the DPF, cat and putting on a full 4" system gives you 17/42 for numbers...

LBZ's are gonna lay down a bit more stock since they dont have DPF's...There's one here locally who put down 338/620 with intake exhaust and no tuning.
 

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Discussion Starter · #7 ·
Thanks guys!
 
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