1-1/4" () - JP Racing: Built for the Track. Chosen by Champions.

1-1/4"

Aeroflow AF59-1255-01 Replacement V-Band Clamp | 1-1/4″ (31.75mm)
£13.32 Inc. VAT
MEZIERE Steel Tube End, Fits 1-1/4″ x 0.065 Tube, 1/2-20 LH Thread
£17.72 Inc. VAT
VIBRANT PERFORMANCE 1 ¼” (32mm) Chrome Crankcase Breather Filter
£21.06 Inc. VAT