Grand Rock Truck Exhaust Systems - Performance Exhaust, Performance Exhaust System, Diesel Performance Exhaust, Heavy Truck Exhaust, Performance Muffler, Quiet Performance Muffler, High Performance Muffler, Truck Muffler, Exhaust Muffler, Diesel Performance, Powerstroke Diesel Performance, Duramax Diesel Performance, Cummins Diesel Performance, Powerstroke Diesel Exhaust, Dodge Cummins Exhaust, Duramax Diesel Exhaust, Westfalia Part

Grand Rock Truck Exhaust Systems - Performance Exhaust, Performance Exhaust System, Diesel Performance Exhaust, Truck Exhaust, Heavy Truck Exhaust, Truck Exhaust System, Truck Exhaust Stack, Truck Exhaust Tip, Truck Exhaust Part, Semi Truck Exhaust, Diesel Truck Exhaust, Ford Truck Exhaust, Dodge Truck Exhaust, Truck Exhaust Pipe, High Performance Exhaust, Truck Muffler, Westfalia, Westfalia Part

OEM Replacement Parts for Kenworth, Peterbilt, Mack, Ford, Western Star, International, Volvo and Sterling. We also specialize in Custom Exhaust Parts and Mufflers.

Vertical Exhaust Stacks and Accessories
• 3" - 7" Diameter • Curved Tops • Bull Horn Tops • Dump Truck Stacks • Mufflers • Exhaust Diverters • Reducers • Elbows • Y-Pipes	• Chrome or Aluminized Steel • Angle Cut Tops • Straight Tops • Clamps • Couplers & Connectors • Heat Shields • Stacks Mounting Brackets • Flex Hose • Grab Handles

Download our new 2007 Online Catalog for more details!

FLEXIBLE EXHAUST HOSE & PREFORMED SEAL CLAMPS

WE HAVE ALL YOUR HEAVY-DUTY EXHAUST PARTS

State-of-the-Art Flexible Exhaust Hose & Preformed Seal Clamp Systems

Grand Rock Truck Exhaust Systems is proud to be the Exclusive Aftermarket Distributor of Westfalia Products in the USA.

State-of-the-Art Flexible Exhaust Hose & Preformed Seal Clamp Systems

• Virtually leak-free, low emission
• Lasts 70% longer* than
• conventional hose
• Won't break**
• Special interlocked profile hose is
• 33% thicker than conventional hose
• OEM Recommended
• In stock and ready to ship today!

The Premier Pre-Formed Band Clamp

• Clamps come assembled with
• reversible Grade 8 Hardware
• Won't distort or pinch flexible or
• standard tubing
• Virtually leak-free, low emission
• 53% Thicker than the competition
• OEM Recommended
• In stock and ready to ship today!

TYPE SSS (33% thicker)

Special Interlocked Profile

Lasts 70% Longer* Than The Conventional Profile!

(Conventional Interlocked Profile)

* On Average
** When Installed Correctly

SIZE & PART#
Diameter	Aluminized Part#	Stainless Part#
3 inch* 4 inch* 5 inch*	n/s WFC-4A WFC-5A	WFC-3 WFC-4 WFC-5

* Not Bright Finish

SIZE	PART#
4x12 4x15 4x18 4x21 4x24 5x12 5x15 5x18 5x21 5x24	WFF-412 WFF-415 WFF-418 WFF-421 WFF-424 WFF-512 WFF-515 WFF-518 WFF-521 WFF-524

Choose Our Flexible Exhaust Hose & Preformed Seal Clamp Systems for
Superior Durability and Greater Value!

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