Xtreme Energy 242/248 Solid Roller Cam for Chevrolet Big Block 396-454 2012 Ford Mustang The American Thunder Crossmember-Back exhaust

The American Thunder Crossmember-Back exhaust system for 1965-1968 Chevrolet Impala and Caprice is perfect for the person looking for a moderate to aggressive sound level inside and outside of the car

The Edelbrock #60679 Performer RPM head is perfect for street performance

Super accurate and individually tested on an Instron SF1240 testing machine

Lightweight LS may require trimming and an additional 1/4" front end drop may occur with a full weight big block

These springs feature a fine-tuned spring rate to give you great handling and a smooth ride

Xtreme Energy 242/248 Solid Roller Cam for Chevrolet Big Block 396-454 2012 Ford Mustang The American Thunder Crossmember-Back exhaustXtreme Energy 242 248 Solid Roller Cam for Chevrolet Big Block 396 454