Yamaha YFZ450R 98mm 99mm Cometic Big Bore Gasket Kit KPMI RED Viton Valve Seals Commander Max 1000 As good as OEM for

As good as OEM for far less money

and provides consistent airflow for enhanced reliability and performance

Rolled thread machining process

ensuring your bike retains its agility without sacrificing strength

91002-KSE-671

Yamaha YFZ450R 98mm 99mm Cometic Big Bore Gasket Kit KPMI RED Viton Valve Seals Commander Max 1000 As good as OEM forC3178,C3178 EST,C3279 EST,2S2 11181 00 00,2S2 11351 00 00, 2S2 11181 00 00, 2S2 11351 00 00 4FM 12213 00 00, 3VD 14613 01 00, 33M 12119 00 00, 4SV 12119 00 00 Yamaha YFZ450R 98mm 99mm Big Bore Cometic Top End Gasket Kit + Viton Seals Product Overview Built for power and reliability, this Cometic 98mm 99mm Big Bore Top End Gasket Kit is designed to support high performance upgrades on Yamaha 450cc engines. Combined with Kibblewhite Precisions Legendary