Grand Rock Powerflow 3" to 4" Exhaust Pipe Adapter Fitting

^$12.99

SuperTruck Essentials Part No: 77620.962

The Grand Rock 3" to 4" exhaust adapter is made of aluminized tubing. The adapter will expand your 3" exhaust pipe to a 4" exhaust pipe size with little to no effort, allowing more mass air flow. If your truck has 3" exhaust and you want to put a Grand Rock dual stack kit on it, you will need this adapter and the 3" clamp. The Grand Rock pre-formed band clamp, sold separately, provides a much better seal then other exhaust clamps.
Made in the USA more...

1 Year Limited Warranty.

Installation Notes

Install Time: Less than an hour

You will need 3" Clamp to install this adapter.
Need tools? Click here

Additional Images

Fits these Vehicles

Fits 3" existing exhaust, converting to 4". Most newer model trucks are 3 1/2" or 4" from the factory. Be sure of your size when ordering.
Universal Fit - This part will fit most vehicles. Some universal fit products require that you select a specific size or style, based on the actual features on your truck.

Product Details

Grand Rock has been the manufacturer building exhaust systems for diesel trucks for 30 years. The quality can be seen in the chrome plating and heard in the sound. Grand Rock Dual Stack kits add style and performance, with horsepower gains and EGT (exhaust gas temperature) cooling ability.

Additionally Available

You will need 3" Clamp to install this adapter.

We also offer Grand Rock

3 1/2"-4" adapter

3 1/2" clamp
for converting from that size exhaust.

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