1968-1974 C3 Front Coil Springs Big Block Pair 331318, 3832518 - OEM Number(s) (331318,3832518)
Restore the ride height, handling, and suspension integrity of your Big Block C3 with this exact reproduction coil spring pair. Designed to match GM’s original blueprint specifications, these front springs are the correct replacement for 1968–1974 Corvettes with 427 and 454 engines. Whether you’re reviving a survivor or completing a full-frame restoration, these springs deliver authentic form and function.
Unlike off-the-shelf generics, this reproduction coil spring set was reverse-engineered from OE GM coil springs to deliver the proper spring rate, coil spacing, and suspension geometry. These are not “close enough”—they are dead-on to factory specs and correct for most 4-speed or automatic Big Block cars without A/C.
Features
• Reproduction of GM part numbers 331318 and 3832518
• Fits Big Block 1968–1974 Corvettes with manual or non-A/C automatic
• Natural finish as original – no paint or coatings
• Progressive wound with 10 coil turns
• 5" outer diameter x 16" height
• .620 wire diameter
• Rated at 475 lbs ±10% spring rate
• Manufactured in the USA
Tech Notes
• Found in the Corvette Assembly Manual and legacy GM parts books
• Tag your springs properly with Coil Spring ID Decal (sold separately)
Because Details Matter
Suspension tuning on Big Block Corvettes was precise—these springs were part of that balance. From stance to steering response, using the correct coils makes a real difference. Don't settle for generics—your Corvette deserves the real deal.
Also known under these part numbers: (For reference only)
- 12511111
- 331318
- 3832518
- 4119
- 573060
- 686420035541
- SU-1023