MOOG Chassis Products CC621 rear coil spring set for the 1977-1985 Chevrolet Impala and other vehicles supports the rear of the car and absorbs road shocks.
- Variable-rate spring with a spring rate of 175 lbs per inch
- 100% load tested
- Designed to lower stresses for longer service life
- Pigtail ends on both sides of the spring
- Easy to install
Quick facts
- Part: MOOG Chassis Products CC621 coil spring set
- Fits: 1977-1985 Chevrolet Impala and other vehicles
- Position: Rear
- Condition: New
A worn or sagging rear spring can show up as premature tire wear from misalignment or a car that sits lower at the back. Those signs alone do not prove the spring is the problem, because worn shocks can wear tires unevenly too. Springs are normally replaced as a pair, and this listing is one spring.
Fits
The vehicles it fits include the 1977-1985 Chevrolet Impala, the 1977-1996 Chevrolet Caprice and the 1992-1996 Buick Roadmaster. Each application calls for one spring. If your car is not named here, find its make, model and years in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Rear
- Quantity per application: 1
- Free height: 424.20 mm (16.70 in)
- Installation height: 323.90 mm (12.75 in)
- Inside diameter: 140.50 mm (5.53 in)
- Outside diameter: 6.870 in
- Bar diameter: 17.10 mm (0.67 in)
- Spring rate: 175 lbs per inch
- Load: 640 lbs
Build and materials
- Spring type: Variable rate
- Ends: Pigtail on both ends
- Condition: New
- Country of origin: United States
Interchange: 566-922 · 91-0621 · 277-5169 · 591-1011 · 832-621
45H3011 · RCS621V · DG5911011 · 52041201 · 4412137 · SMS621V · 64002 · U621DV · SP08023 · 110115
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
Is this an Impala coil spring for the 1977-1985 Chevrolet Impala?
Yes. MOOG Chassis Products CC621 is a rear coil spring set that fits the 1977-1985 Chevrolet Impala. This listing is one spring.
Is this a Caprice coil spring for the 1977-1996 Chevrolet Caprice?
Yes. The MOOG CC621 rear coil spring fits the 1977-1996 Chevrolet Caprice, and each application takes one spring.
What spring rate does the MOOG CC621 have?
The CC621 is a variable-rate spring at 175 lbs per inch. Its free height is 16.70 in (424.20 mm) and its installation height is 12.75 in (323.90 mm).
Can worn rear coil springs cause uneven tire wear?
Yes, they can. Worn or sagging coil springs can cause premature tire wear from misalignment, and a rear that sits visibly low can be another sign.
Are these rear coil springs load tested?
Yes. This rear coil spring is 100% load tested and designed to lower stresses for longer service life.
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