Shop › GISP2102 Image 1 of 1 GISP2102 $12.50 Master cylinder repair kit, .70” bore. TRW brand. For clutch master cylinder on TR4-TR4A-TR6 (1970-76). Add To Cart Added! Master cylinder repair kit, .70” bore. TRW brand. For clutch master cylinder on TR4-TR4A-TR6 (1970-76). You Might Also Like Pipe and Hose Clips from $1.50 GI64473143 $10.50 122289 $5.00 Girling Branded Clutch Kits from $5.00 Clutch Hydraulics, TR250-TR6 from $15.00