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Flowmaster 817523 Force II Exhaust Kit, 2007-08 GM Truck
Flowmaster 817523 Force II Exhaust Kit, 2007-08 GM Truck

Flowmaster 817523 Force II Exhaust Kit, 2007-08 GM Truck

07-08 Chevy Silverado 1500, 07-08 GMC Sierra 1500, 3" Tube O.D., Stainless Steel, 3 Inlet Size

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Flowmaster 817523 Force II Exhaust Kit, 2007-08 GM Truck
Flowmaster 817523 Force II Exhaust Kit, 2007-08 GM Truck
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We estimate this item will ship on or before May 30th.
Part # 378817523
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Important Messages:

  • This item ships directly from the manufacturer. It may take an additional 2 business days for Flowmaster to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.


Tube O.D.:
Material Type:
Stainless Steel
Inlet Size:
Outlet Location:
Single Side
Outlet Size:
MFG. Part #:
GTIN Code:
Heat Shield:
Muffler Quantity:
Muffler Series:
Super 50 Series
Single or Dual:
Sound Level:
Mild Sound
Exhaust System Type:
Cat-back System
Tip Quantity:
Will not Fit Extra Cab Long Bed, 09-11 will only fit Extra Cab w/6' bed and Crew Cab w/5.5' bed


For the person who wants a subtle custom appearance with all the benefits that a Flowmaster Cat-back exhaust system provides. S.O.S. (Single out side) systems are the perfect choice. This Force II system delivers a mild exterior and interior tone, and is suited to customers looking for efficiency improvements without a lot of noise. Especially recommended for towing applications. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.

  • Mandrel bent 16 gauge stainless steel tubing
  • Stock to mild exterior exhaust tone
  • Includes hangers and hardware for easy installation
  • Connects After Factory Catalytic Converter

Installation Instructions (PDF)


2007-2008 Chevrolet Silverado 1500 4.8L V8
2007-2008 GMC Sierra 1500 4.8L V8


Fits 2007 to 2008 GM Silverado and Sierra on a 1/2 Ton chassis with a 4.8L or 5.3L engine with Flex Fuel option, fits all wheelbases except Extended Cab with long bed configuration, also fits 2009 to 2013 Chevrolet Silverado and GMC Sierra on a 1/2 Ton chassis with a 5.3L engine with Flex Fuel option, fits Extra Cab with 6.5 foot bed and Crew Cab with 5.5 foot bed only, fits 2 and 4 wheel drive models.
Some parts are not legal for use in California or other states with similar laws/regulations

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