Showtime Customs & Fabrication


Regular price $1,999.00
Unit price  per 

Our new generation of VT-VZ IRS Kits are now available!
These kits allow you to shorten the rear wheel track on your Commodore as well as eliminating 90% of the flex that the factory control arms and bushings suffer from under hard launches and cornering!

 This Listing is for-

1 x Pair - SCF Shortened IRS Trailing Arms
1 x Pair - Wrecker supplied Driveshafts (Good useable condition. Higher HP rated Driveshafts available for additional cost) 

These arm's have been designed to shorten the rear wheel track 50mm/2" per side!
This Kit can work with factory wheel tubs or mini tubs, providing you have the correct width/offset wheels (See below)

Not only do we shorten the track but we also run a Chromoly tubular outer arm and Chromoly Teflon lined heim joint & threaded adjuster which eliminates all of the flex that the outer bushes suffer from under hard launches in drag racing and heavy cornering in drift/race applications, and to further aid in ease of alignment we have fitted SuperPro Adjustable bushes to the inner pickup points.
These Kits also do away with the poorly designed/weak factory rear Toe rods.

By shortening the rear wheel track a greater wheel offset is required, it is advised that you have the kit fitted before measuring and ordering your new wheels!

Below measurements are NOT the exact measurement's required but only an estimated largest wheel size/offset of what MAY fit.


15 x 8" with 5" Backspace- 255/60 Radial
20"/22" x 9.5" with 6" Backspace (+19 Offset)

Split Tubbed- 

15 x 10" with 6.5" Backspace- 275/60 Radial
20"/22" x 10" with 6.5" Backspace (+25 Offset)

If wanting to run the 20x10" 4" backspace Flow Formed Simmons then the vehicle will require minitubbing and a 
100mm Shortened IRS (If you like the wheel to sit close to the guard with a little camber when slammed)

If you hope to lower the vehicle then we suggest running either our Camber Boxes or Tubular Subframe, which you can find below

Camber Boxes-
IRS Weld on Camber Boxes VQ-VZ/Pontiac GTO – Showtime Customs & Fabrication

Tubular Subframe-
IRS TUBULAR REAR SUBFRAME- VT-VZ Inc GTO – Showtime Customs & Fabrication

Trailing arm's are modified factory item's that are in good working order locally sourced from wreckers and once completed are finished in a Satin Black enamel, this means that they may have small blemishes and inconsistencies. 
We can Powdercoat the arms and fit new wheel bearings at an additional cost, If you would like this service please do not hesitate to email us! 🙂

Shipping is Flat Rate of $195 to all major Cities & Suburbs, Remote Area's may incur an additional Surcharge. 

UTE/WAGON- If wanting to lower the vehicle, Shortened shocks will need to be fitted.

Use of ANY products or components designed, manufactured or sold by ‘Showtime Customs & Fabrication’ is done so at your own risk!

All products and components must be installed by a professional.

It is up the user to conduct regular maintenance checks and if there is a product or components to be found faulty or worn, to have it replaced before otherwise failure can occur.

Use of ANY products or components designed, manufactures or sold by ‘Showtime Customs & Fabrication’ leading to / resulting in any product damage, injury or death, Showtime customs & Fabrication is not liable or at fault.

All suspension, steering, brake etc products or components are to be specifically used in an ‘Off Road’ application for ‘Show’ purposes only.

Now all that aside, get out there, have some fun & be sure to tag our Instagram and Facebook page!

Please Note- All orders are manufactured per order, please allow up to 6 weeks for the order to be fulfilled before shipping.
If you have any queries on turn around time please don't hesitate to get in touch with us.
Do NOT place the order if you feel these wait times will not work in with your needs, we do not offer direct refunds due to each order being manufactured individually, only store credits will be offered.