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Borla CrateMuffler for Chevrolet Big Block Stock Output 396/402/427 CID S-Type
Ride height change
Manufactured from Mandrel-Bent 6061 Aluminum
The Evolution delivers more power
Minor adjustments may be required for fitment
BC Racing ER-Series Coilovers (F-20-ER) 1797 Borla CrateMuffler for Chevrolet BigOur newest and most advanced model yet is the ER series coilover. It features large external reservoirs front and rear, separate rebound and compression adjustment and a twin piston design. The external reservoirs hold much more oil than the conventional coilovers, allowing the coilover to operate for a much longer period of time before overheating. The external reservoirs also house the secondary piston, which allows for the adjustment of