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 122289 $5.00 Clutch Mechanicals, TR4A-TR250-TR6 from $3.50 Girling Branded Clutch Kits from $5.00 Clutch Hydraulics, TR250-TR6 from $15.00 LDSSB629 $35.00