Wavetrac LSD for BMW 168 Small-Case Axle, r=3.91: Caterham, 1 Series 116i-120i, 3 Series 318i-323i

A limited slip differential for BMW's small 168mm rear axle with a 3.91 final drive - the axle Caterham use, and the one under the four-cylinder 1 Series (E81 to E88) 116i to 120i and 3 Series (E90 to E93) 318i to 323i. On a light car like a Seven, an open diff spins the inside wheel at every tight exit; the Wavetrac keeps driving the other one.

• For BMW's 168mm small-case axle with a 3.91 final drive
• Caterham with the BMW 168 axle
• BMW 1 Series E81-E88 116i-120i and 3 Series E90-E93 318i-323i
• Keeps drive on the gripping rear wheel

Check before you order

• The cars listed are a guide only: BMW fitted more than one axle size and final drive ratio to the same model. Confirm your axle size and ratio from the VIN or the axle's part number before ordering.

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