Firestone Sport-Rite air helper springs could be the answer to all of your ride-performance needs. They're state-of-the-art tapered air springs that mount between the frame and suspension of your vehicle and deliver benefits whether it's empty or loaded. When it's empty, they enhance the ride quality. However, when you need to do some serious hauling, they can add up to 3,000 lbs. per set to your load-carrying capacity. Some drilling may be required.
Owner's Manual
Installation Instructions
Installation Instructions
Warranty

This Part Fits:

Year	Make	Model	Submodel
1999-2005	Chevrolet	Silverado 1500	Base
2004-2006	Chevrolet	Silverado 1500	Hybrid
1999-2006	Chevrolet	Silverado 1500	LS
1999-2006	Chevrolet	Silverado 1500	LT
2003-2006	Chevrolet	Silverado 1500	SS
2002-2006	Chevrolet	Silverado 1500	WT
2004-2005	Chevrolet	Silverado 1500	Z71 Off-Road
2007	Chevrolet	Silverado 1500 Classic	Hybrid
2007	Chevrolet	Silverado 1500 Classic	LS
2007	Chevrolet	Silverado 1500 Classic	LT
2007	Chevrolet	Silverado 1500 Classic	SS
2007	Chevrolet	Silverado 1500 Classic	WT
2007	Chevrolet	Silverado 1500 HD Classic	LT
1997-2000	Ford	F-150	Base
2000-2003	Ford	F-150	Harley-Davidson Edition
2001-2003	Ford	F-150	King Ranch
1997-2003	Ford	F-150	Lariat
1999-2003	Ford	F-150	Lightning
1997-2003	Ford	F-150	XL
1997-2003	Ford	F-150	XLT
2004	Ford	F-150 Heritage	SVT Lightning
2004	Ford	F-150 Heritage	XL
2004	Ford	F-150 Heritage	XLT
1997-1999	Ford	F-250	Base
1997-1999	Ford	F-250	Lariat
1997-1999	Ford	F-250	XL
1997-1999	Ford	F-250	XLT
1997	Ford	F-250 HD	XL
1997	Ford	F-250 HD	XLT
1999-2003	Ford	F-250 Super Duty	Lariat
1999-2003	Ford	F-250 Super Duty	XL
1999-2003	Ford	F-250 Super Duty	XLT
2002-2005	GMC	Sierra 1500	Base
2001	GMC	Sierra 1500	C3
2002-2006	GMC	Sierra 1500	Denali
2002	GMC	Sierra 1500	HT
2005-2006	GMC	Sierra 1500	Hybrid
1999-2003,2006	GMC	Sierra 1500	SL
1999-2006	GMC	Sierra 1500	SLE
1999-2006	GMC	Sierra 1500	SLT
2002-2006	GMC	Sierra 1500	WT
2007	GMC	Sierra 1500 Classic	Denali
2007	GMC	Sierra 1500 Classic	Hybrid
2007	GMC	Sierra 1500 Classic	SL
2007	GMC	Sierra 1500 Classic	SLE
2007	GMC	Sierra 1500 Classic	SLT
2007	GMC	Sierra 1500 Classic	WT
2007	GMC	Sierra 1500 HD Classic	SLE
2007	GMC	Sierra 1500 HD Classic	SLT