4 Inch Diameter

4 Inch Pipes

4 Inch Air Intake Hoses

4 Inch Air Intake Pipes

4 Inch Brackets

4 Inch Clamps

4 Inch Couplers & Connectors

4 Inch Diverter Boxes

4 Inch Other Products

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4" Flared Machined Turbo Lip for 8.3L Cummins 3910995

Grand Rock 4" Flared Turbo Lip for 8.3L Cummins 3910995

MSRP: $172.00

$148.00

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4" Stainless AccuSeal Band Exhaust Clamp 430 Stainless AS-4SS

Grand Rock 4" AccuSeal Exhaust Clamp Stainless Steel AS-4SS

MSRP: $44.00

$33.00

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Grand Rock 4" Aluminized AccuSeal Exhaust Band Clamp AS-4A

MSRP: $34.00

$29.00

AT-4SS Air-Intake Clamp 4 inch T-Bolt Stainless Steel

Grand Rock 4" Air-Intake Clamp T-Bolt Stainless Steel AT-4SS

MSRP: $48.00

$33.00

Grand Rock BT-54A 4" OD Aluminized Tube to Weld to Diverter Box

MSRP: $50.00

$35.00

4" x 6" Exhaust Connector ID-OD Aluminized CN-46A

Grand Rock 4" Exhaust Connector ID-OD Aluminized CN-46A

MSRP: $85.00

$50.00

4" x 8" Exhaust Coupler ID-ID Aluminized CP-48A or 31-400A

Grand Rock 4" Exhaust Pipe Coupler ID-ID Aluminized CP-48A

MSRP: $87.00

$52.00

4" x 8" Exhaust Coupler/Connector ID-ID Chrome CP-48C

Grand Rock 4" Exhaust Coupler/Connector ID-ID Chrome CP-48C

MSRP: $112.00

$82.00

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Grand Rock 4" Diesel Pick-up Dual Exhaust Kit DPU-4SK

MSRP: $872.48

$697.98

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Grand Rock 4" OD x 32" Aluminized Dump Truck Stack Double Bend Turnout DPS402

MSRP: $307.00

$217.00

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Grand Rock 4" OD Chrome Dump Stack 90 A-10.5 B-16 C-24 OVERALL 30.5

MSRP: $459.00

$359.00

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Grand Rock 10" x 36" Universal Muffler with 4" ID End ARG-0436

MSRP: $451.00

$350.00

629 products total