2018 + Honda CB300 F R SMOG Block Off Plate PAIR SAS Valve Eliminator Kit CB 300F 300R mixture to alter the stoichiometric

mixture to alter the stoichiometric air/fuel ratio

You will receive 2 BLUE & 2 BLACK adapter plates

2021+ Speedmaster 1200

They are 65mm long overall

2018 + Honda CB300 F R SMOG Block Off Plate PAIR SAS Valve Eliminator Kit CB 300F 300R mixture to alter the stoichiometricSMOG BLOCK OFF KIT The PAIR SMOG system feeds fresh air into the exhaust to aid in the combustion of unburned fuel. It was designed to improve emissions, but will cause problems with many aftermarket exhausts mufflers. Plates are machined from billet aluminium. Stainless steel bolts & washers, plus a high temp rubber airbox cap is supplied. Also includes a PAIR valve eliminator plug, to fool the ECU into thinking it is still connected & prevent it