S&S, SuperStock cylinder head kit. Silver - 06-17 Twin Cam (excl. Twin-Cooled models) (NU) 509953 Will replace OEM steel 17905-53B

Will replace OEM steel 17905-53B pushrods to help reduce reciprocating mass

Bolt thread 8mm

Models with dealer-installed cruise control may require different or additional lower switch housings

The 98% pure copper core delivers increased heat dissipation for more reliable starts and reduced risk of overheating

2022 (NU) FXRST Low Rider El Diablo

S&S, SuperStock cylinder head kit. Silver - 06-17 Twin Cam (excl. Twin-Cooled models) (NU) 509953 Will replace OEM steel 17905-53BSilver powder coated. Stock style high performance bolt on replacement for Twin Cam models, compatible with stock manifolds, rocker boxes and exhausts. Heads are 79cc and take stock diameter 1. 940" intake and 1. 575" exhaust valves. Head will handle up to . 650" lift and are set up to be used with up to . 186" intake & . 179" exhaust TDC lift in combination with stock pistons. This allows the use of S&S 510, 570 and 585 camshafts. Heads can be decked