QA1 High Travel Coil-Over Spring - 2-1/2" I.D. x 10" Tall - 500 lb. 13091 Mounting hardware included with 3/4-16

Mounting hardware included with 3/4-16 O-ring ports (8 AN)

Genuine Equus replacement parts

Fits 2008 to 2010 Dodge Challenger SRT8 and R/T

Dynamic Spectrum Tuning Of The Air/Fuel Ratio

103 mm Throttle Body Flange

QA1 High Travel Coil-Over Spring - 2-1/2" I.D. x 10" Tall - 500 lb. 13091 Mounting hardware included with 3/4-16Powder Coated, Chrome Appearing Silicon Manganese SteelAll QA1 springs are manufactured using the highest quality chrome silicone. This material offers high strength, consistency and longer life. Cold Wound Heat Treated Shot PeenedAll QA1 springs go through intensive manufacturing processes to ensure consistency, accuracy and durability. Squared EndsAll QA1 springs are ground at both ends to ensure straight, consistent and accurate operation.