MCS-561655 - Thinner than stock. 1.880" I.D. Viton. Used between manifold and cylinder head. All S&S manifolds require thinner than stock manifold the head seals to compensate for the larger S&S port diameter. Note: Thicker stock seals may damage S&S manifolds.

Fitment:
84-17 B.T. (excl. M8); 86-22 XL; 08-12 XR1200. With S&S manifold (NU)