KJ Jones Brand Manager, 5.0 Mustang & Super Fords
April 4, 2014

The tall stance of new Mustangs is infamous. The gaping pass between fenders and tires was implemented in the late-model 'Stangs to ensure sufficient clearance for installing snow chains, and for maneuvering the vehicles through the automated segments of the assembly process at Flat Rock.

While this certainly is a novel consideration for Ponies that gallop through snowbound streets, enthusiasts on the whole believe the excessive height is one of the biggest universal detractors to a Mustang's appearance. In particular, seeing the high stance on specialty rides like '12-'13 Boss 302s really makes us cringe. The Boss is touted as a road-race-caliber street machine, but its high position definitely limits the car's handling and ability to carve up a road course in record time. It's a problem that by all means should be corrected, and using springs that are made specifically for lowering Boss 302s is the best way to get it done.

In the summer of 2013, our friends at Ford Racing Performance Parts gave us a heads up on FRPP's new, Boss-only spring package (PN M-5300-T; $359.95). As you can imagine, since lowering a 'Stang is among the first changes enthusiasts make with their new cars, finding a Boss 302 that still sat at its standard ride height was a bit of a challenge. We sought the assistance of Ricardo Topete of GTR High Performance, who was able to find us a gem of a candidate for the lowering project—a rare Laguna Seca version of the vaunted Boss.

The following photos follow Ricardo as he performs the spring swap, which lowers a Boss 302 by 1.375 inches in the rear and almost an inch up front. Suffice it to say, the new springs bring the rare Boss down where it belongs.

GTR’s Ricardo Topete clamps down on Ford Racing Performance Parts’ new Boss 302 lowering spring (front), preparing it for installation on a ’12 Boss 302 Laguna Seca.
Like all late-model ’Stangs, even the Boss 302 is born with a tall stance from the factory. Notice how the rear is prominently higher than the front.
The Boss 302 lowering set (PN M-5300-T; $359.95) consists of four variable-rate springs that lower Boss 302s and Laguna Seca editions by approximately 0.6-inch in the front and 1.375 inches in the rear. Installing the package requires using a spring compressor for the front springs, and a wheel alignment might be necessary once the procedure is completed. Ricardo references Ford’s ’11-up Mustang service manual for torque values for all of the fasteners that are loosened during this procedure.
Front and rear bumpstops are included with the spring package. The new, shorter stops, which are OEM pieces on ’12-’14 GT500s (PN M-5570-A; $26.39), will improve the lowered Pony’s stability and ride quality.
This is our project Mustang’s ride-height measurement with Ford Racing Performance Parts’ Boss 302 front lowering springs installed, after a short cruise to allow the springs to settle. The ’Stang’s front end started with a nearly 3-inch wheelwell space when our project began.
The Laguna Seca’s rear wheelwell gap closed a little more than an inch by the upgrade. The gap was 3 inches apart with the factory springs.
Dropped and ready to roll! FRPP’s Boss 302 springs give the Laguna Seca the aggressive stance it should’ve had from the get-go, and it’s sure to step up its handling as well. 5.0