4 Inch Diameter

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" x 48" Heat Shield No Holes Polished SS with 2 brackets PG-448NS

Grand Rock 4" x 48" Heat Shield Solid Polished SS with 2 brackets

MSRP: $411.05

$323.00

Grand Rock 4" x 48" Heat Shield Round Holes Aluminized with 2 brackets PG-448RA

MSRP: $317.05

$277.00

4" x 48" Heat Shield Round Holes Polished SS with 2 brackets PG-448RS

Grand Rock 4" x 48" Heat Shield Round Holes Polished SS with 2 brackets

MSRP: $410.05

$357.00

4" x 48" Heat Shield Vertical Slots Polished SS with 2 brackets PG-448VS

Grand Rock 4" x 48" Heat Shield Vertical Slots Polished SS with 2 brackets

$337.00

Grand Rock 4" Chrome Heat Shield Bracket PG-4CBRKT

MSRP: $102.00

$82.00

Grand Rock PRKY-13944 5" Peterbilt Retro Y-Pipe Exhaust

MSRP: $420.50

$360.50

Grand Rock 4" ID to 3.5" ID Exhaust Reducer Aluminized Pipe R4I-35IA

MSRP: $91.00

$61.00

R4I-35OA 4" ID to 3.5" OD Exhaust Reducer Aluminized Pipe

Grand Rock 4" ID to 3.5" OD Exhaust Reducer Aluminized Pipe R4I-35OA

MSRP: $93.00

$63.00

R4I-3IA 4" ID to 3" ID Exhaust Reducer Aluminized Pipe

Grand Rock 4" ID to 3" ID Exhaust Reducer Aluminized Pipe R4I-3IA

MSRP: $92.00

$62.00

Grand Rock 4" ID to 3" OD Exhaust Reducer Aluminized Pipe R4I-3OA

MSRP: $91.00

$61.00

Grand Rock 4" OD to 3.5" ID Exhaust Reducer Aluminized Pipe R4O-35IA

MSRP: $81.00

$51.00

R4O-35OA 4" OD to 3.5" OD Exhaust Reducer Aluminized Pipe

Grand Rock 4" OD to 3.5" OD Exhaust Reducer Aluminized Pipe R4O-35OA

MSRP: $93.00

$63.00

633 products total