Pontiac GTO / VZ Complete GForce Performance 9" Rear End IRS Kit 2004-2006

The bolt-in 9” kit eliminates the flex, noise, “clunking” and weak points of the OEM rear. Plus, you have the confidence knowing you are putting your power through a race-proven bulletproof rear end, but you get all the benefits and advantages an IRS can provide. In addition, the GForce 9” kit comes standard with 35 spline inner stubs. In fact it is the only 9” IRS on the market with the beefy 35-Spline inner axle stubs.

The GForce 9” has been proven to support 2000+ in “real-world” applications. The GForce 9” kit holds IRS records in the ¼ mile, standing mile and 2-mile in wheel standing IRS vehicles. It’s safe the say the misconception that you cannot put power through an IRS and make it live has been officially debunked.

All GForce Engineering 9” housings are laser cut, bent on a CNC press brake and tig welded for flawless finish and unmatched strength. 9” kits can be purchased as a complete kit with pumpkin and driveshaft. Our preferred provider is Strange Engineering. GForce can also make you driveshafts specifically designed to work with the 9” replacement rear and most common transmission options.

More about GForce Engineering Renegade Axles
The all new GForce Engineering Renegade Axles are a direct replacement for factory half-shafts and are designed for cars with everything from mild bolt-ons to those running superchargers and turbos. The Renegade axles are leap above entry level axles. Machined from proprietary aerospace billet alloy, the Renegade axles feature an upgraded 31-spline axle bar and 31-spline billet machined CV joints. The additional splines offer more spline engagement and allow for larger diameter axle bars equaling unparalleled strength.

In addition to more spline engagement the billet machined 31-spline CV’s provide more travel and increased operating angle than OEM CV joints. They also provide a significant increase in wear characteristics and durability over standard 108mm CV’s commonly found in axle upgrades.

GForce 9” Kits Include the following:
Fabricated 9” housing (bolts to factory locations)
Heavy-duty front mount
Solid aluminum or poly bushings
35 Spline Inner and Outer Stubs
Renegade 9” axles
All necessary hardware
Third member to housing
Housing and front mount to cradle
HD aluminum Strange third member
4” aluminum driveshaft (New 4.0" aluminum driveshafts use upgraded tubing, billet Sonnax slip joints, and billet Sonnax direct bolt flanges)

Note: If you are interested in 31 spline diffs, the GForce 9” can be ordered with 31-spline inner stubs. Please call for more information on this application.

*GForce 9” Kits are designed to fit in the factory location and work with factory components with as little modification as possible. When installing a GForce 9” kit, it is up to the installer to check for clearance around all components, including potential clearance issues from drivetrain and suspension movement. Modification might be necessary for driveshaft clearance, especially with exhaust. 9” kits are not guaranteed to fit with ANY other aftermarket products.

Damage Prevention
No driveline component is bombproof! GForce does not put a power rating on any driveline components as there are entirely too many variables that can affect a driveline component outside of power.

Lowered Vehicle Information
GForce axle shafts were manufactured based on OEM suspension. Aftermarket shocks, control arms, etc. may present clearance issues. If CV boots have clearance issues, low profile boots can be purchased at an upgraded cost. The low profile boots reduce the amount of available axle angle in comparison to the standard boots, so they are not ideal for lowered or high axle angle vehicles. If you have questions or would like to add low profile boots to your axles, please contact us for more information.

Maintenance Information 
All driveline components will fatigue or wear over time depending on how the vehicle is driven and what level of performance is demanded from them. CV joints are a wear item and will see wear over time, but with our current design, axles can be sent in for service. So boots, fasteners, and CV assemblies can be serviced without scrapping the complete axle assembly. Individual inner or outer splined stubs and axle bars can be replaced as well if they twist or are damaged due to wheel hop or simply from power levels exceeding capability of the material. Reach out to GForce directly for current repair costs or component replacement

Lifetime Warranty
GForce backs all Renegade Axles with a limited lifetime warranty. Warranty is limited to stubs and axle bars only and only to the parts GForce Manufactures. CV’s and CV boots are considered a wear-item and carry a limited 1-year warranty. Warranty is transferrable, but restrictions for transfer of ownership do apply.

TREperformance is an Authorized Priority Dealer of GForce Performance Engineering.