BORG WARNER 5.5" inch S400/472/476/480/488 5.51" TURBO BOOST LEAK TESTER- BILLET
Borg Warner S400 SXE series with compressor covers 5.5" (5.51", 139.95mm). BW S400, S472, S476, S480, S488. Pressurize the boost leak tester with an air compressor and a tire inflator tool. How do I know if I have a Boost Leak??.