3590-313 – Cv Double Joints Heads – 1350 CV FLANGE Series – Bolt Circle Dia 4.250″ – Butt Dia 2.260

The 3590-313 CV double joint head is the flange-side assembly for constant velocity driveshafts operating at steep angles — SAS builds, long travel suspensions, transfer case drop kits. It provides the ball socket centering mechanism that prevents velocity variation through the joint's full operating range. The 3590-313 CV double joint head requires exact pilot diameter and bolt circle to seat correctly on the axle or diff flange.

3590-313 Cv Double Joint Head — Series: 1350 CV FLANGE. Bolt Circle & Pilot Specs

Series: 1350 CV FLANGE. The 3590-313 CV double joint head specs: 4.250 bolt circle | 3.125 pilot | 2.260" butt dia | 5.94" end-to-weld. Ram 2500/3500 front shaft. Pilot diameter is critical for the centering ball mechanism — a loose pilot allows the CV head to walk off-center at high angles, which defeats the entire purpose of the CV design. End-to-weld factors into compressed driveshaft length calculations.

Before ordering the 3590-313 CV double joint head, measure your existing flange bolt circle and pilot in millimeters or decimal inches. European and Toyota flanges vary by year and application — spec sheet data isn't always reliable on swapped or modified vehicles. Measure the actual flange.

Key Features

• Series: 1350 CV FLANGE
• Bolt circle: 4.250 — must match flange bolt pattern exactly
• Pilot dia: 3.125 — centers CV head on flange, critical for CV function
• Butt dia: 2.260" — driveshaft tube connection point
• End-to-weld: 5.94" — factors into compressed shaft length
• Tube fit: 2.50X0.120
• CV double joint design — eliminates velocity variation at steep operating angles
• Note: Ram 2500/3500 front shaft

Specifications

• SKU: 3590-313
• Brand: UDS
• Series: 1350 CV FLANGE
• Bolt Circle: 4.250
• Pilot Dia: 3.125
• Butt Dia: 2.260"
• End to Weld: 5.94"
• Tube Fit: 2.50X0.120
• Notes: Ram 2500/3500 front shaft