4.00 Inch Mandrel Bend X Cutting Jigs
These jigs are designed for accurately cutting 4.00" mandrel-bent tubing to create smooth-flowing X-pipes for exhaust systems. An X-pipe helps merge both exhaust banks together, improving exhaust scavenging and producing a smoother, more refined exhaust note.
The jig halves clamp securely around the tubing using socket head bolts. Only light clamping pressure is required to hold the tube firmly in place during cutting. Each bolt location uses captive nuts retained directly within the 3D printed jig for quick assembly and easy operation.
📦 Example X-pipe models are also included for all jig sizes to help with setup and final assembly reference.
📏 Included Models
🔹 4.00" Tube – 1D / 101.6mm CLR
Tight radius for compact exhaust routing
🔹 4.00" Tube – 1.2D / 121.92mm CLR
Balanced compact radius for tighter installations
🔹 4.00" Tube – 1.25D / 127mm CLR
Versatile mid-radius option for custom fabrication
🔹 4.00" Tube – 1.5D / 152.4mm CLR
Larger radius for smoother flow characteristics
🔩 Required Hardware
1 × M8 x 100mm socket head bolt
1 × M8 nut
2 × M6 x 100mm socket head bolts
2 × M6 nuts
Any material can be used but materials with a higher temperature rating would be better, especially for prolonged use cutting bends down.
May need some supports on the holes for the bolt depending on how well your printers deals with overhangs.
Print models in orientation they are already in
At least 4 walls and 25% infill
