Helper Spring 2.25in ID Exhaust Systems 81 in OD - C1-R4

81 in OD - C1-R4 Valve - Digressive - Steel - Zinc Plated - Each

5 in Diameter - Steel - Stainless - Ford Mustang 2015-20 - Each

Dinan engineers designed the F30 340i and F32 440i exhaust to improve exhaust flow by reducing back pressure

- A precise 20-25% throw reduction - Counter balanced to reduce effort  - Two piece 416 stainless steel & aluminum stick assembly  - Two piece stick provides vibration free operation  - Dampened pivot cup with self lubricating pivot ball  - Polymer Iglide T-500 lower pivot bushings

providing peace of mind as well as avoiding that notorious 'limp' mode when things get simply too hot

Helper Spring 2.25in ID Exhaust Systems 81 in OD - C1-R4Coil Spring Helper 2. 25 in ID 3 in Length 12 lb Spring Rate Steel Black Powder Coat Each