Twin Power™ derby cover gaskets are designed to seal the primary inspection/derby opening on various Big Twin generations, helping prevent fluid leaks while allowing repeated cover removal.

• Model specific gaskets for different Big Twin years and primary designs
• Sold in convenient 5-packs for shops and frequent service work
• Help keep primary fluid contained around the derby opening
• 4 Exc. 1999 FXST, FLST
• Made in USA