The video below explains the concept behind our Narrow Differentials and the benefits including longer axles and more wheel travel. Using Large Diameter Bearings and a Hollow Diff Centre allows the CV Joints to be mounted up inside the Ring Gear.

We have created a technical video explaining some of the benefits of using our reverse direction quick change transfer case in a Mid or Rear Engined 4WD Trophy Truck.

This video discusses the advantages of Reverse Rotation and Under Drive to allow the use of Stronger Lo...

• Do you need an electric oil pump?

• Engine Oil? Gearbox Oil Cooler? Diff Cooler?

• What flow rate do you need?

• 0.25GPM? 2 GPM? 3 GPM?

• Before you buy one, read this...

• We have tested most pump brands and most are complete GARBAGE - be warned....

  ...

ULTRA4 Expands into Europe

• Wales

• Scotland

• Portugal

• Italy

Will IFS Vehicles Dominate the European Series?

The ULTRA 4 series (USA) has expanded into Europe and competitors from all over europe compete in ULTRA 4 racing on the same basis as the King...

How Much More Wheel Travel Can I achieve?

• Calculate Additional Wheel Travel Based on Axle Length

• Proformance Ultra Narrow IFS and IRS DIfferentials

• More wheel travel - Less CV Joint Angle - Less CV Failures

There are plenty of IFS (Independent Front Sus...

Can Thread Lockers SNAP your bolts in Half?

During the 6 Month final assembly of our brand new $300,000 Off Road Race Truck, I noticed a few of my very expensive, 12 point, Military Spec Bolts were broken (snapped in half), after being torque up using our new “Digital”...

What are your Spark Plug Lead Conductors made of?

Engine Misfires?

After many months of annoying black spark plugs, Proformance Motorsport recently changed our Spark Plug Leads to the Awesome MSD 8.5mm Super Conductor Leads.

AN INCREDIBLE IMPROVEMENT!!

When our new sm...

• Do you have to heat your Diff Oil in microwave before you can pour it into your diff casing?

• Do you have to jack your truck up and run the diff on stands for 10 mins before each race?

• Ever wondered why your TT or ULTRA 4 Diff blows up when running thinner...

Do you ever drive your ULTRA 4 Rock Racer In Reverse?

Are your Diffs Mounted Upside Down?

• What happens to your diffs in reverse?

• Are they as strong in both directions?

• Are some diffs stronger in reverse?

Typical passenger vehicles, 4WDs', Suv's and Truc...