QA1 Pro Coil High Travel Coil-Over Spring - 4.125 ID X 10 750# Silver Valve Cover Hold Down Tabs Bolts onto 6 bolt internally

Bolts onto 6 bolt internally balanced crankshaft with 10-inch and 11

1958-1958 Chevrolet Sedan Delivery

fits 18688 and 18689Aeromotive Inc

Easy to install much like traditional MSD Crank Trigger Kits (use with ATI Balancer 917302 or 918852 but is also compatible with 917264 and 917242)

QA1 Pro Coil High Travel Coil-Over Spring - 4.125 ID X 10 750# Silver Valve Cover Hold Down Tabs Bolts onto 6 bolt internallyAvailable in 7", 9", 10", 12", 14" and 16" lengths, QA1 offers an assortment of high travel springs with a silver powder coated finish. Made in the USA, these 2" I. D. high travel springs are manufactured from specially designed high tensile, chrome silicon alloy spring wire, which allows them to have fewer coils and a smaller wire diameter. As a result, these springs are lighter and have increased travel due to the larger distance between the coils.