How to Install Class 8 Stainless Steel Half Fenders: Step-by-Step Guide
Installing half fenders on a semi-truck requires precise alignment, proper clearance checks, and rigid frame mounting. In this technical walkthrough, TwinStick Garage demonstrates the installation of Class 8 Manufacturing stainless steel half fenders on a Peterbilt 359 chassis.
This video covers the complete installation sequence from initial mock-up to final hardware torquing:
Setting Ride Height & Clearance: Airing up suspension to standard ride height to ensure a 5–7.5 cm (2–3 in) gap above tires, preventing fender damage during complete suspension dump.
Fender Mock-Up: Blocking and leveling the fender over the tire to determine front paddle and rear bracket frame locations.
Frame Drilling & Stump Mounting: Using a magnetic base drill with annular cutters to bore through multi-layer steel frame channels, securing threaded mounting stumps with threadlocker.
Paddle Fitment & Template Alignment: Utilizing the Class 8 hole template to mark, center-punch, and drill mounting holes cleanly through the stainless fender face.
Rear Support Arm Installation: Fastening the rear under-fender support bracket to the spring hanger and drilling mounting holes for flush-fit stainless carriage bolts.
Watch the full installation walkthrough above to ensure clean alignment and lasting durability on your rig.
Source: YouTube video
Full Tandem Fender Install — Peterbilt
The 299 Chrome Shop installed a set of Class Eight full tandem fenders in the shop — cleaner look, better protection, and one step closer to getting this rig dialed in. Check out the finished result.
Source: TikTok
Class Eight Half Fender Install — Torqued by Reagan
Torqued by Reagan walks through a full Class Eight half fender install, from bracket fitment to final hardware. This one covers the whole process start to finish:
- Bracket Layout & Measuring: Positioning the mounting bracket near the spring hanger and taking precise measurements to set the correct height and clearance off the tire.
- Stud Welding: Welding new mounting studs onto the frame to create solid, secure anchor points for the bracket hardware.
- Fender Mock-Up on the Tires: Resting the half fender across the tandem tires to dial in placement and check bracket alignment before final mounting.
- Final Mounting & Hardware: Working from underneath to torque down the mounting hardware, locking the fender and bracket firmly in place.
The result: a clean, secure half fender install with solid bracket support and a finished look ready for the road.
Source: TikTok