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Black vinyl cap, 1-1/16" size. Push it over an open vacuum nipple, hose barb or boost port to seal it off during a boost leak test, so the air stays in the intake and you can actually find the leak.
Need a few sizes? Grab the 10-piece vinyl cap set.
Free shipping on orders over $50. Ships same day when ordered before 5pm PST Mon–Fri or 2pm Sat.