Grand Rock Powerflow “Big Rig” Single Stack Kit

Grand Rock Powerflow “Big Rig” Single Stack Kit

From $152.71

Universal – All Makes & Models (Fabrication Required)


Powerflow “Big Rig” Aluminized Stack Kit
Easy-to-install kit gives your pick-up that “BIG RIG” look!
Great flow – improved performance.
Functional – Routes exhaust fumes above and away from livestock, car haulers, and cargo where diesel smoke is unwanted.
Select many different exhaust stack styles and lengths to use with this system (stack not included with kits)
Part Number

Part Number Diameter of Stack Inlet Diameter

SPU-4SK 4″ 4″

SPU-5SK 5″ 4″

SPU-6SK 6″ 4″

SPU-7SK 7″ 4″

SPU-5SK-5I 5″ 5″

SPU-6SK-5I 6″ 6″

SPU-7SK-5I 7″ 5″

NOTE: On ALL Stack Kits that are 6″ or 7″, order SK, SP or SBH stacks. These are reduced to 5″ OD at the bottom.

Kit includes bright stainless unistrap clamp to secure stacks
Quality AccuSeal heavy gauge band clamps included in kits
Everything included except chrome stack. Down pipes, Mufflers and Intermediate pipe not included with these kits.

Additional information


SPU-4SK, SPU-5SK, SPU-6SK, SPU-7SK, SPU-5SK-5I, SPU-6SK-5I, SPU-7SK-5I, spu-4sk, spu-5sk, spu-6sk, spu-7sk, spu-5sk-5i, spu-6sk-5i, spu-7sk-5i