Side exit exhaust voids whipple and FP warranty?

[Racervx54]

Just learned this yesterday after installing a side exit on a 2025. So frustrating to say the least...................... How the hell does that even matter whipple and FP have issues to fix if that really causes problem.

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[12Lariat21]

My assumption is that under high loads and long durations with a short exhaust (side exit pre-axle) or cut-outs, don't create enough exhaust system backpressure, and thus could result in; too high of temperatures for the exhaust valves, catalytic converters, or maybe just cause the system to run too lean...either way, they have you limited for 3-years, 36,000 miles. after that warranty is done, so let'er rip!

Or these are arbitrary modification's the lawyers figure only people who race their trucks and/or abuse them would do, so they have to protect themselves from warranty costs.

 

[Powerboost_Law]

Doesn't make any sense, my 04 Lightning is side exhaust. Completely different motor though.

 

[powerboatr]

My assumption is that under high loads and long durations with a short exhaust (side exit pre-axle) or cut-outs, don't create enough exhaust system backpressure, and thus could result in; too high of temperatures for the exhaust valves, catalytic converters, or maybe just cause the system to run too lean...either way, they have you limited for 3-years, 36,000 miles. after that warranty is done, so let'er rip!

Or these are arbitrary modification's the lawyers figure only people who race their trucks and/or abuse them would do, so they have to protect themselves from warranty costs.

Engine masters pretty much proved
Boosted engines do not need back pressure downstream of turbo to run efficiently. Or supercharged engines

Less is best

Side cut outs issue seems dumb
I seem to remember a few f150 jelly bean looking trucks with pipes exit right before rear tire....

 

[Powerboost_Law]

Engine masters pretty much proved
Boosted engines do not need back pressure downstream of turbo to run efficiently. Or supercharged engines

Less is best

Side cut outs issue seems dumb
I seem to remember a few f150 jelly bean looking trucks with pipes exit right before rear tire....

Now that you mention it, I remember 1997, all the f-150's had side exhaust back in those days until Ford has mass Warranty claims for rims, 1998 was back to exhaust out the back.

 

[v8440]

Engine masters pretty much proved
Boosted engines do not need back pressure downstream of turbo to run efficiently.

You're right about that-in fact, back pressure downstream of the turbo is VERY effective at killing power. Richard Holdener proved that by swapping post-turbo exhaust systems back and forth and demonstrating how much power disappears when you introduce more post-turbine back pressure. The turbo spins because of a pressure differential across the turbine housing. Any pressure after the turbine housing reduces the pressure differential.

 

[CarbonMark]

Whipple states long-tube headers and pre-axel exit exhaust modifications are not supported on the very last page of the install manual (pg. 52). Full cat-back exhausts are actually recommended.

These kits have CARB approval numbers. I bet anything that effects significant engine airflow is frowned upon because is was not tested for these certification submissions.

 

[EL5_Zero]

Are you guys also aware that Whipple DOES NOT provide transmission coverage if your vehicle is 4x4?

 

[v8440]

That is not correct. ALL wheel drive vehicles are not covered but FOUR WHEEL DRIVE vehicles are. There is a fine technical distinction between 4wd and all wheel drive, and Whipple considers that distinction. I know-I called them myself and asked them exactly that question for the same reason you brought it up. As long as the truck does not have an awd system, which I take to mean something that can automatically engage the front axle without being told to by the driver, it will cover the truck. Now, you are correct that the transfer case and axles are not covered.

 

[EL5_Zero]

That is not correct. ALL wheel drive vehicles are not covered but FOUR WHEEL DRIVE vehicles are. There is a fine technical distinction between 4wd and all wheel drive, and Whipple considers that distinction. I know-I called them myself and asked them exactly that question for the same reason you brought it up. As long as the truck does not have an awd system, which I take to mean something that can automatically engage the front axle without being told to by the driver, it will cover the truck. Now, you are correct that the transfer case and axles are not covered.

Thank you for the clarification!

 

[DMTack]

This is wild considering Friendly down there in Houston area sells more whipple trucks than anyone and it seems like every one has a side exit corsa on it.

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