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Blanco1's avatar
Blanco1
Explorer
May 23, 2018

Exhaust Brake on a 12 valve Hot Rod Cummings, manual trans?

I’ve been considering an Exhaust Brake for years while traveling with our big Lance 900 in our truck bed. But now that I have sold that & I’m towing a heavier Travel Trailer & on our 1st outing pro...
Tow Vehicles
rhagfo's avatar
rhagfo
Explorer III
May 24, 2018
Cummins12V98 wrote:
Contact PacBrake. Go with the 4" outlet model. The standard 3" is too restrictive.

X2!
With a 12 valve you will need to replace the exhaust valve springs.
I have a PacBrake on our 2001 switch under throttle pedal, activates when released, disengages when you step on throttle. I bypassed the ECM on the 2001, switch on shifter, at finger height switch off at lights, flick back on as I take off, just natural now!

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