Mark Houlahan
Brand Manager, Mustang Monthly
June 1, 2013
Photos By: Source Interlink Media Archives

The ETI coilover system from RMP is a simple coilover shock replacement that utilizes the stock shock absorber and coil spring mounting points on the '65-'70 Mustang. What this allows is for vintage Mustang owners to easily adjust their ride height and shock valving for road or track conditions. You can even quickly change out spring rates as well by simply unbolting the coilover assembly versus having to deal with a spring compressor on the typical stock coil spring affair. The best thing about the ETI system is it works with the stock suspension on your Mustang. You can install the ETI system now and upgrade to aftermarket control arms later. Or if you already have new control arms and just want some adjustability in your ride quality and ride height the ETI is a great solution. Application: '65-'70 Mustang

Shock/Strut: coilover shock assembly
Adjustable: QA1 single adjustable for rebound and compression with 18 setting options using external knob, optional double adjustable QA1with 18 compression and 18 rebound settings for 324 shock settings using external knobs
Kit Contents: QA1 coilover shocks, QA1 coilover springs, coilover mounting brackets
Pricing: $1,000

Speed Direct

Speed Direct may be more known for their power rack-and-pinion steering conversions for vintage Mustangs (under the Steeroids brand), but they have now engineered a simple bolt-in coilover conversion to complement their rack-and-pinion kits. The Vector Series is available in staged kits with full front and rear hardware, or you can just get the front coilover conversion, which is what we're focusing on here for our guide. The Vector Series front coilover conversion is designed as a direct replacement for the stock shock and coil spring parts; which means the Vector Series kit will bolt onto your stock or stock-replacement style upper control arms. This keeps costs down while still improving handling via adjustable shock valving and ride height abilities. The QA1 adjustable shocks are paired with conical springs that sit in the stock spring seat of the Mustang's shock tower and the upper shock mount utilizes the original Mustang shock mount bracket as well. Speed Direct offers different spring rates for street or track use. Application: '65-'70 Mustang

Shock/Strut: coilover shock assembly
Adjustable: QA1 single adjustable for rebound and compression using external knob, optional double adjustable QA1with separate compression and rebound settings using external knobs
Kit Contents: QA1 coilover shocks, coilover springs, coilover mounting brackets
Pricing: $899-$1,220

Total Control Products

Total Control Products (TCP) made a name for themselves during the Eleanor Mustang boon due to their suspension use on the actual movie cars. TCP, which was later purchased and integrated into the Chris Alston's Chassisworks brands, has grown steadily from the Eleanor years with all manner of suspension and chassis parts for early Fords, not just Mustangs. One of TCP's original and best sellers is their complete coilover front suspension conversion. This system uses super-strong tubular upper and lower control arms (with the upper being adjustable) along with a tubular adjustable strut rod to transform the Mustang's front suspension into a coilover capable system. The coilover itself is mounted on the lower arm directly behind the lower ball joint for better ride quality and control without using super stiff springs. The upper control arms can be lowered using TCP's optional drill jig, or even better, the arms can be ordered with a dropped pivot shaft for simple bolt-on installation without drilling your shock towers. The lower control arm and strut rod feature TCP's exclusive TruCenter pivot points with polymer races for precise suspension pivot movement without the bind of rubber bushings or the harshness of a rod-end. The system is designed to utilize your stock spindle and TCP offers its own spindle as well.

Application: 1965-1973 Mustang
Shock/Strut: coilover shock assembly
Adjustable: single adjustable for both compression and rebound with 16-setting external knob, optional double adjustable for compression and rebound separately with two 16-setting external knobs (256 shock settings)
Kit Contents: tubular adjustable upper control arms (dropped pivot shaft an option), tubular lower control arms with TruCenter pivots, tubular adjustable strut rods with TruCenter pivots, single or double adjustable Varishock coilover shocks, VariSpring coilover springs in 310-750 lb/in ratings (user choice), bolt-on coilover shock mounts