QA1 Pro Coil High Travel Coil-Over Spring - 4.100" ID 10.0" Length - 350 lb/in Spring Rate 10234C The inner PTFE hose is

The inner PTFE hose is compatible with all brake fluids

Closely match port shape and location of heads

The second phase of new carburetors build on the success of the originals by adding more cfm sizes and options including a black coated finish

4140 Chrome-moly Internals

3/16 Offset

QA1 Pro Coil High Travel Coil-Over Spring - 4.100" ID 10.0" Length - 350 lb/in Spring Rate 10234C The inner PTFE hose isAvailable 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.