The standard tuned pipe adapter has been designed to be used with the OS .10 FSR and the.12 CZM engine. It may also be used with the OS .10-.15 and the Enya .11 CX engine. PACKAGE INCLUDES: 1-Standard tune pipe adapter (aluminum w/pre-drilled holes) 1-Silicone tubing (1-3/4") 2-Zip ties (Length: 5-1/2") 2-Bolts w/washers (2mm) Length:1-1/2" REQUIRES: Customer needs to purchase the tuned pipe separately. MACG1110 (2.5cc)