Red carburetor dashpot spring for fine tuning the acceleration curve on HS style carburetors. These 4.5oz red springs were standard on most HS2 and HS4 carburetor applications, but some small bore Coopers and early spridgets used the lighter blue springs.
Carburetor Dashpot Spring - HS Type (Red / 4.5oz)
Fits:
HS style carburetors.