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See for yourself why the Superlift K781 and K781B F.I.T. Series adjustable 5" to 6" lift kit design smokes the competition... This kit fits all 1999, 2000, 2001, 2002, 2003, 2004, 2005 and 2006 model year Chevrolet Silverado K1500 and GMC Sierra K1500 4x4 1/2-ton pickups. This is Superlifts newest GM replacement knuckle system and it addresses all of the problems that have historically plagued knuckle lifts in the past. Plus, the K781 and K781B kits tout numerous new and unique performance enhancing features. The entire Superlift 5" to 6" lift system was modeled using the most current computer design software, allowing Superlift engineers to tweak each component for optimum performance. This helps ensure that the various sub-systems work together to create the absolute best lift available for the 1/2 ton K1500 GM trucks!Numerous design features combine to form the Superlift "Frame Integrated Technology" (FIT) design concept:
Replacement Steering Knuckles - The stock upper control arms remain in their factory location, while the lower control arms are dropped 5.00" inches. New cast ductile iron knuckles span the increased vertical distance between the upper and lower arms. Superlifts knuckles yield the best possible alignment specifications - they maintain zero degrees of camber and toe angle change throughout the suspension travel cycle. This produces rock-solid drivability traits. The Superlift knuckle design also minimizes CV axle plunge (side-to-side movement) to eliminate the possibility of CV axle disengagement, a problem that still plagues other manufacturers. The Superlift knuckle design accepts the factory spare tire and wheel in an emergency situation.
Integrated High-Clearance, One-Piece Crossmembers and Full-Size Belly-Pan - The interlocking assemblys overall fit is more typical of what is found in the aerospace industry than the automotive aftermarket industry! Countersunk fasteners were chosen to stitch the pan and crossmembers together because of their unmatched strength and rigidity. These components, and the remainder of the systems load-bearing bracketry, are laser cut from 1/4" thick plate steel. The front differential is lowered a full 4.00 inches - that's more than other systems - to reduce CV axle angle and premature axle component wear. Yet, because of the Superlift high-clearance crossmember design, overall ground clearance rivals that of most lift systems on the market today. As an added bonus, front differential structural integrity is not compromised - the differential reinforcement webbing is not cut-away. Plus, the factory front drive shaft is retained.
Compression Travel Control - GM engineers designed the front compression travel stops to engage as soon as the suspension begins to load. The stops actually supplement torsion bar (spring) rate. Most aftermarket manufacturers have not taken this to heart, since their designs allow quite a bit of wheel travel before stop engagement occurs. This is especially true if the torsion bars are adjusted-up for increased lift height; more height creates more space beneath the factory suspension stops. Too much spacing creates a spongy ride, increased body roll and sway, excessive nose-dive when braking, and torsion bar fatigue. Superlift addresses compression travel in two ways. First, Superlift replaces the factory stops with new stops designed specifically for the K1500 series GM 1/2 ton trucks. These new stops, offered only by Superlift, feature a higher compression rate to offset the increased loads generated by wider / heavier tires and wheels, and the rigors of performance driving. Secondly, remember how handling suffers when stop spacing is incorrect? Superlift provides shims that ensure proper stop spacing throughout the 5" to 6" lift height range; this is yet another Superlift exclusive. The Superlift FIT series lift system installs quick and easy. Also, the vehicle can be returned to stock later, if desired. Superlift offers two rear lift methods for pickups: a 5" tapered block kit or replacement rear spring packs. Please note... Four Superlift Superide shocks are included in the $1499.00 price! - gas front, hydraulic rear. As a performance upgrade we offer the same kit with the Superlift / Bilstein high-pressure monotube gas-charged shocks. The Superlift / Bilstein upgrade is HIGHLY recommended! Superlifts FIT system... unsurpassed performance, backed by the Superlift Limited Lifetime Warranty, all at a competitive price; this is as good as it gets. Superlift recommends a 35 x 12.50 tire mounted on a 16x8" or 17x8" wide aftermarket wheel with back space not to exceed 4.625" inches. Factory wheels do clear the knuckles, but if oversized tires are used with factory wheels the tire sidewall may rub the upper control arms. Other options include: front and rear multi-shocks, Super-Trac II traction bar system, a Rock Ring to strengthen and protect the rear differential, and a stainless steel brush guard style skid plate that features the Superlift flame logo. Finally, customers can complete the look with Superlifts stainless steel Rail Wraps - Superlifts new frame dress-up panels - and their tubular stainless steel kicker struts. Note that because of strength concerns, kicker struts are mandatory with some competitors systems; not so with Superlifts FIT system... kickers are considered optional items for appearance enhancement only. For more information please click on the "ask a question" link located at the very top of this page. This item ships for FREE via standard ground service!
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