Longfield 30-Spline 4340 Chromoly Super Set (Rock Assault Housings) The Longfield™ birfields are made out of 100% chromoly and are precision polished to remove any imperfections that may cause stress risers. The Longfield™ birfield housing is made out...

Longfield 30-Spline 4340 Chromoly Super Set (Rock Assault) The Longfield™ birfields are made out of 100% chromoly and are precision polished to remove any imperfections that may cause stress risers. The Longfield™ birfield housing is made out of...

Longfield Chromoly Studless Hub Kit A new, innovative, never before seen product, our Longfield™ Studless Hubs set the bar in quality and performance. The Longfield™ Studless Hub replaces the weaker, prone-to-breaking locking hubs, hub gears, and hub...

30-Spline 4340 Chromoly Super Set (Longfield) With larger tires and more horsepower being used on the trails these days, upgrades to your axle are more critical than ever. In a Toyota, one of the common failures are the stock 27-spline birfields and...

RCV Ultimate 30 Spline CV Front Axles Manufactured in the U.S. using only high-strength chromoly materials, RCV Performance Ultimate 30 spline CV Axle set simply replaces your weak Toyota axle shafts with a new high-strength design. The factory axles...

RCV Ultimate 30 Spline CV Front Axles Manufactured in the U.S. using only high-strength Chromoly materials, RCV Performance Ultimate 30 spline CV Axle set simply replaces your weak Toyota axle shafts with a new high-strength design. The factory axles...

Trail Creeper Ring & Pinion (Front & Rear Bundle) All you need to regear your 4WD pickup truck or 4Runner with solid front axle configuration (8" Only). This Kit Includes gear set (front and rear) and install kits (front and rear). Also, as an...

Rear Rock Assault Axle Housing Kit (IFS Width) The axle tubes are now made from 5/16" thick, high strength DOM tubing and engage 5/8" farther into the center section. On top of that, there is a 360° gusset welded around the tubes on the inside of...

Rock Assault Rear Axle Housing (W/ Options) The axle tubes are now made from 5/16" thick, high strength DOM tubing and engage 5/8" farther into the center section. On top of that, there is a 360° gusset welded around the tubes on the inside of the...

RCV Ultimate 30 Spline CV Front Axles Manufactured in the U.S. using only high-strength Chromoly materials, RCV Performance Ultimate 30 spline CV Axle set simply replaces your weak Toyota axle shafts with a new high-strength design. The factory axles...

Longfield 27 Spline Birfield Axle Kit The Longfield birfields are made out of 100% chromoly and are precision polished to remove any imperfections that may cause stress risers. The Longfield™ birfield housing is made out of forged 4340 chromoly steel...

Long Travel Driveline (Matsuba U Joint) We are pleased to announce the release of a new and improved heavy duty drive line. The heavy duty driveline splines are 42% larger than our old design and the spline section is nylon-coated to prolong many years...