Product Summary

Single Spring Valve Spring Style

  • Works with stock '49-'53 Ford retainers
  • Set of 16

Key Specs

MFG. Part #450185G
BrandSpeedway Motors

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Our complete line of valve train parts to help your flathead Ford V8 run on unleaded fuel. These heavy duty single valve springs are made from top-quality chrome silicon steel and are designed to work with stock 1932-1953 Ford retainers.

  • Recommended for most street performance 1932-53 Ford/Mercury Flathead V8s
  • Chrome silicon material delivers reliable performance
  • Proper seat pressure for most street and street/strip Flathead cams
  • Installed Height: 2.00"
  • Seat Pressure: 85 lbs @ 2.00" installed height

Note: "Full Race" cams should be paired with our 450-4005 dual valve springs.


CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


MFG. Part #450185G
BrandSpeedway Motors
Valve Spring StyleSingle Spring
Outside Diameter1.02"
Installed Height2.00"
Seat Pressure85 lbs. at 2.00"
Sold in QuantitySet
NotesSet of (16)