Page 531 - 2018 Racecar Engineering Drag Racing Parts and Accessories Catalog

Pro Coil-Over Systems
Update early GM muscle cars to modern coil-over front suspension with precise rebound and ride height adjustments. Kits include
conical front coil springs, threaded body aluminum shocks, hardware and instructions. Offered in street and drag racing “R” series,
choose the kit which best matches front end weight.
Kit Series Street Series “R” Series Street Series “R” Series Street Series “R” Series
Front End Weight 1701-1900 lbs. 1701-1900 lbs. 1901-2100 lbs. 1901-2100 lbs. 2101-2300 lbs. 2101-2300 lbs.
Spring Rate 350 lbs. 350 lbs. 450 lbs. 450 lbs. 550 lbs. 550 lbs.
Buick
1973-87, Regal QA1GS401-10350C QA1GR401-10350C QA1GS401-10450C QA1GR401-10450C QA1GS401-10550C QA1GR401-10550C
1964-67, Skylark/GS QA1GS501-10350A QA1GR501-10350A QA1GS501-10450A QA1GR501-10450A — —
1968-72, Skylark/GS QA1GS401-10350B QA1GR401-10350B QA1GS401-10450B QA1GR401-10450B QA1GS401-10550B QA1GR401-10550B
1975-79, Skylark/Apollo, QA1GS401-10350C QA1GR401-10350C QA1GS401-10450C QA1GR401-10450C QA1GS401-10550C QA1GR401-10550C
Chevy
1967-69, Camaro QA1GS401-10350A QA1GR401-10350A QA1GS401-10450A QA1GR401-10450A QA1GS401-10550A QA1GR401-10550C
1970-81,Camaro QA1GS501-10350C* QA1GR501-10350C QA1GS501-10450C QA1GR501-10450C QA1GS501-10550C QA1GR501-10550C
1964-67, Chevelle QA1GS501-10350A QA1GR501-10350A QA1GS501-10450A QA1GR501-10450A — —
1968-72, Chevelle QA1GS401-10350B QA1GR401-10350B QA1GS401-10450B QA1GR401-10450B QA1GS401-10550B QA1GR401-10550B
1973-83, Chevelle QA1GS401-10350C QA1GR401-10350C QA1GS401-10450C QA1GR401-10450C QA1GS401-10550C QA1GR401-10550C
Full Size, 1955-57 QA1GS501-10350A QA1GR501-10350A QA1GS501-10450A QA1GR501-10450A — —
1970-72, Monte Carlo QA1GS401-10350B QA1GR401-10350B QA1GS401-10450B QA1GR401-10450B QA1GS401-10550B QA1GR401-10550B
1973-88, Monte Carlo QA1GS401-10350C QA1GR401-10350C QA1GS401-10450C QA1GR401-10450C QA1GS401-10550C QA1GR401-10550C
1968-74, Nova/Chevy II QA1GS401-10350A QA1GR401-10350A QA1GS401-10450A QA1GR401-10450A QA1GS401-10550A QA1GR401-10550A
1975-79, Nova/Chevy II QA1GS401-10350C QA1GR401-10350C QA1GS401-10450C QA1GR401-10450C QA1GS401-10550C QA1GR401-10550C
1982-04, S-10/S-15 2WD QA1GS401-10350C QA1GR401-10350C QA1GS401-10450C QA1GR401-10450C QA1GS401-10550C QA1GR401-10550C
Oldsmobile
1964-67, Cutlass/442 QA1GS501-10350A QA1GR501-10350A QA1GS501-10450A QA1GR501-10450A — —
1968-72, Cutlass/442 QA1GS401-10350B QA1GR401-10350B QA1GS401-10450B QA1GR401-10450B QA1GS401-10550B QA1GR401-10550B
1973-88, Cutlass/442 QA1GS401-10350C QA1GR401-10350C QA1GS401-10450C QA1GR401-10450C QA1GS401-10550C QA1GR401-10550C
1973-74, Omega QA1GS401-10350A QA1GR401-10350A QA1GS401-10450A QA1GR401-10450A QA1GS401-10550A QA1GR401-10550A
1975-79, Omega QA1GS401-10350C QA1GR401-10350C QA1GS401-10450C QA1GR401-10450C QA1GS401-10550C QA1GR401-10550C
Pontiac
1967-69, Firebird QA1GS401-10350A QA1GR401-10350A QA1GS401-10450A QA1GR401-10450A QA1GS401-10550A QA1GR401-10550A
1970-81, Firebird QA1GS501-10350C* QA1GR501-10350C QA1GS501-10450C QA1GR501-10450C QA1GS501-10550C QA1GR501-10550C
1964-67, Lemans/GTO QA1GS501-10350A QA1GR501-10350A QA1GS501-10450A QA1GR501-10450A — —
1968-72, Lemans/GTO QA1GS401-10350B QA1GR401-10350B QA1GS401-10450B QA1GR401-10450B QA1GS401-10550B QA1GR401-10550B
1973-87, Lemans QA1GS401-10350C QA1GR401-10350C QA1GS401-10450C QA1GR401-10450C QA1GS401-10550C QA1GR401-10550C
1974-77, Ventura/GTO QA1GS401-10350C QA1GR401-10350C QA1GS401-10450C QA1GR401-10450C QA1GS401-10550C QA1GR401-10550C
* System with double adjustable shock absorbers also available, substitute QA1GD501-10350C.

GM Street And Race Control Arms Pro-Rear Systems
Tubular steel control arms reduce
unsprung weight and improve handling
characteristics. Street control arms
have polyurethane bushings and OEM-
style ball joints, while Race versions use
low friction, low deflection bushings and
low friction ball joints. Upper control
arms include offset cross shafts for
eased camber adjustment. Sold in pairs with necessary hardware.
Upper Lower
Control Arms Control Arms
Description Part No. Part No. A complete rear coil-over conversion kit, the Pro-Rear System is
Street Control Arms versatile, lightweight and durable. Suited to drag racing or street
1967-69, GM F-Body, 1968-74 X-Body QA152417 QA152419
1964-7, GM A-Body QA152422 QA152437 applications, custom mount, weld-in kit includes lightweight
1982-04, S-10/S-15 QA152467 QA152466 aluminum, single adjustable coil-over shock absorbers, choice
Race Control Arms of linear or variable rate coil-over springs, shock crossmember,
1967-69, GM F-Body, 1968-74 X-Body QA152317 QA152319 mounting brackets and all required hardware.
1970-81 GM F-Body QA152318 QA152320 1100-1300 lbs. 1301-1500 lbs. 1501-1700 lbs.
1964-72 GM A-Body QA152322 QA152337 Description Part No. Part No. Part No.
1978-88 GM G-Body QA152365 QA152364
Rear End Weight
Note: Although primarily intended for use with QA1 Pro Coil-Over Systems, Pro-Rear System, QA1DS501-12110 — —
control arms may be used with conventional coil springs with the purchase Linear Springs
of bolt-in coil spring adapters, offered separately and listed below. Pro-Rear System, QA1DS501-12100V QA1DS501-12130V QA1DS501-12175V
Variable Springs
Coil Spring Adapters
Specialized adapters bolt direct into QA1 tubular lower control arms and allow use of a stock-style coil spring.
Part No. Description
QA17720-168 Coil Spring Adapter, 1964-72 GM A-Body, 1967-69 GM F-Body, 1968-79 GM X-Body
QA17720-203 Coil Spring Adapter, 1973-77 GM A-Body, 1978-88 GM G-Body, 1970-81 GM F-Body, 1982-04 S-10

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