ISR Performance Couplers and Clamps - T-Bolt Hose Clamp - 4.00"+8mm

For 4 inch piping, a worm-gear clamp is simply out of its depth. The ISR Performance T-bolt hose clamp in 4.00 inch plus 8mm size is built for the large couplers found on big turbo intake tubes and oversized intercooler inlets, where the coupler has a lot of area for boost to work against.

What Sets It Apart

• T-bolt tensioning pulls the band tight around the full circumference, not just at the screw.
• Flat band surface protects the silicone from cutting or creasing.
• Can be removed and refitted repeatedly, which matters when you are chasing a boost leak or swapping piping.

Understanding the Size

Treat the 4.00 inch plus 8mm figure as the coupler outside diameter the clamp is designed around. The extra 8mm accounts for the silicone wall sitting on top of a 4 inch tube. Measure your installed coupler if your piping or coupler brand is not standard.

Where It Fits

Universal application for 4 inch coupler joints: turbo inlet pipes, large intercooler piping, and intake systems on any chassis.

Installation

Place the clamp over the coupler before assembly, center it over the pipe end, tighten gradually and evenly, then re-torque after a heat cycle. Avoid overtightening; a T-bolt needs far less effort than a worm clamp to hold.

All ISR Performance products are designed for off-road use only.