S&S 55mm 17-21 M8 Performance Intake Manifold S&S 55mm 17-21 M8 Performance Intake Manifold CNC machined T6 die-cast aluminium. Capable of higher flow, adding 3 to 5 horsepower. It fits as a direct replacement that is better, stronger, and a more heat resistant replacement than the stock plastic (polymer) manifold. Especially above 124″ the stock manifold becomes a restrictive part. Comes with a new rubber seal. Easy to install. can reuse all OEM parts. 17-21 M8 Shipments Payment methods Paypal NB as professional sellers we can issue regular invoice if expressly requested in the notes in the purchase phase.
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