Fits as a direct replacement upgrade for the standard manifold. It is a better, stronger and a more heat resistant replacement for the stock plastic (polymer) manifold. Made of T6 heat treated cast aluminum that is CNC machined on outside, but also CNC machined / ported on inside, for the ultimate in high-flow characteristics. Adds 3 to 5 horsepower and up. Especially above 124" the stock manifold becomes a restrictive part. Comes with a rubber o-ring seal. Easy to install, re-using all stock parts. OEM replacement reference 27300121. Note: For replacement o-ring seal see fmc-974-061.
Fits: > 18-23 Softail 107/114/117; 17-23 Touring 107/114/117
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