Grand Rock - 6" 90° Elbow 13" x 13" OD-OD Chrome Exhaust Pipe

Grand Rock - Peterbilt 359, 377, 378, or 379 Exhaust Y-Pipes

Grand Rock - 6" 90° Elbow 13" x 13" OD-OD Aluminized Exhaust Pipe

Grand Rock - 8" I.D. to 5" O.D. Exhaust Reducer Pipe (Aluminized)

Grand Rock - 5" reduced to 7" or 7" reduced to 5" Exhaust Reducer Pipe (Chrome)

Grand Rock - 6 Inch x 36 Inch Brute Chrome Monster Stack Reduced to 5 Inch Outer Diameter

Grand Rock - Peterbilt 90-Degree Exhaust Turbo Elbow

8" Stacks Reduced to 5" Chrome Exhaust Stacks

Grand Rock - 7" I.D to 5" O.D. Aluminized Steel Exhaust Adapter

Grand Rock - Peterbilt 377 & 378 Chrome Exhaust Elbows

Grand Rock - 7" Inner Diameter (I.D.) to 5" Inner Diameter (I.D.) Aluminized Reducer

Grand Rock - Various Dimension Exhaust Reducer Pipe (Aluminized)

Grand Rock - Kenworth 5" Aluminized Double Bend Exhaust Pipe O.D./O.D.

Grand Rock - Standard Style Mufflers - (5 Inches x 51 Inches)

Grand Rock - Peterbilt 379 5", 6" or 7" 55-degree Chrome Exhaust Elbows

Grand Rock - 4" or 5" Resonators

Grand Rock - 9" Exhaust Mounting Clamp

Grand Rock - Peterbilt 359 5", 6" or 7" 67-degree Exhaust Chrome Elbow

Grand Rock - 5" 45-Degree 8" x 8" OD-OD Aluminized Exhaust Elbow

Tapered 6", 7" or 8" 90 Degree 29" x 20" Reduced to 5" O.D. Chrome Exhaust Pipe

Grand Rock - Peterbilt Lower Exhaust Elbow

Grand Rock - 4" Diameter Marmon Flare - 3" Length

Grand Rock - Peterbilt Exhaust Stack Mounting Clamps

Grand Rock - Under Truck Mufflers