Trailing Arm - Rear - Lower - Rectangular Tubing - Greasable - Polyurethane Bushing - Steel - Black Powder Coat - Ford Mustang 1979-2004 - Pair

QA1 79-04 Ford Mustang/79-86 Mercury Capri Lower Boxed Trailing Arms

All upper tubular and lower boxed trailing arms use polyurethane bushings on both ends, while upper adjustable and lower tubular trailing arms use a spherical ball or rod end assembly on the chassis end to eliminate bushing bind, allowing the suspension to move smoother for better control. This keeps the tires planted firmly on the ground for improved traction and a more predictable, better handling car. Trailing arms are powder-coated gloss black for a long lasting finish. Boxed Trailing Arms are constructed from 0.120'' wall cold rolled steel tubing for maximum strength and flex elimination. These trailing arms have fluted, greasable polyurethane bushings, which are superior to the stock rubber bushings. Tubular Trailing Arms are constructed from 1-1/4'' diameter, 0.120'' wall steel tubing which offers increased strength over other designs but also has the added advantage of lighter weight. These trailing arms have fluted, greasable polyurethane bushings, which are superior to the stock rubber bushings. Heavy-Duty Adjustable Trailing Arms allow easy rear suspension adjustments for optimum handling and traction. Simply loosen the jam nuts and adjust the pinion angle without removing the arms from the vehicle. They replace soft OE differential bushings with polyurethane differential bushings, and they use a spherical ball or rod end assembly with UHMW polyethylene bushings on the chassis end to allow the rear suspension to move more freely and eliminate bushing bind. Adjustable Tubular Lower Trailing Arms are offered in both aluminum and steel. These arms are the ultimate in weight savings and adjustability, and they feature QA1's premium self-sealing and self-lubricating X Series (heat treated chromoly steel) or A Series (aircraft aluminum) rod ends. Kits include (2) lower control arms with rod ends and jam nuts. All parts sold in pairs.

Additional Information

Lower box-style trailing arms for 79-04 Mustang & 1979-86 Capri. Made with .12" wall thickness and have greasable bushings.

Part Type

Suspension Trailing Arm

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb	SKU	Kit Title
	qapDK31-FMM2	QA1 79-93 Ford Mustang Level 1 Drag Kit w/o Shocks (1x qap5221, 1x qap5255, 1x qap52885)
	qapDK31-FMM3	QA1 94-95 Ford Mustang Level 1 Drag Kit w/o Shocks (1x qap5221, 1x qap5255, 1x qap52885)
	qapDK31-FMM4	QA1 96-04 Ford Mustang Level 1 Drag Kit w/o Shocks (1x qap5221, 1x qap5255, 1x qap52885)
	qapDK41-FMM1	QA1 79-86 Ford Mustang Level 1 Drag Kit w/ Shocks (1x qap5221, 1x qap52885, 1x qapHD01-12200, 1x qapRCK52401)
	qapDK41-FMM2	QA1 87-89 Ford Mustang Level 1 Drag Kit w/ Shocks (1x qap5221, 1x qap52885, 1x qapHD01-12200, 1x qapRCK52401)
	qapDK41-FMM3	QA1 90-93 Ford Mustang Level 1 Drag Kit w/ Shocks (1x qap5221, 1x qap52885, 1x qapHD02-12200, 1x qapRCK52401)
	qapDK41-FMM4	QA1 94-04 Ford Mustang Level 1 Drag Kit w/ Shocks (1x qap5221, 1x qap52885, 1x qapHD03-12200, 1x qapRCK52401)
	qapDK42-FMM1	QA1 79-86 Ford Mustang Level 2 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX104M, 1x qapMUK01, 1x qapHD01-14150, 1x qapRCK52405, 1x qap52540)
	qapDK42-FMM2	QA1 87-89 Ford Mustang Level 2 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX102, 1x qapMUK02, 1x qapHD01-14150, 1x qapRCK52405, 1x qap52540)
	qapDK42-FMM3	QA1 90-93 Ford Mustang Level 2 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX102, 1x qapMUK02, 1x qapHD02-14150, 1x qapRCK52405, 1x qap52540)
	qapDK42-FMM4	QA1 94-04 Ford Mustang Level 2 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX104, 1x qapMUK02, 1x qapHD03-14150, 1x qapRCK52405, 1x qap52541)
	qapDK43-FMM1	QA1 79-86 Ford Mustang Level 3 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX104M, 1x qapMUK01, 1x qapT121W, 1x qapHD01-14150, 1x qapRCK52409, 1x qap52540)
	qapDK43-FMM2	QA1 87-89 Ford Mustang Level 3 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX102, 1x qapMUK02, 1x qapT121W, 1x qapHD01-14150, 1x qapRCK52409, 1x qap52540)
	qapDK43-FMM3	QA1 90-93 Ford Mustang Level 3 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX102, 1x qapMUK02, 1x qapT121W, 1x qapHD02-14150, 1x qapRCK52409, 1x qap52540)
	qapDK43-FMM4	QA1 94-04 Ford Mustang Level 3 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX104, 1x qapMUK02, 1x qapT121W, 1x qapHD03-14150, 1x qapRCK52409, 1x qap52541)
	qapHK42-FMM1	QA1 79-86 Ford Mustang Level 2 Handling Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52892, 1x qapBAX104M, 1x qapMUK01, 1x qapHD01-12200, 1x qapRCK52407, 1x qap52740)
	qapHK42-FMM2	QA1 87-89 Ford Mustang Level 2 Handling Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52892, 1x qapBAX102, 1x qapMUK02, 1x qapHD01-12200, 1x qapRCK52407, 1x qap52740)
	qapHK42-FMM3	QA1 90-93 Ford Mustang Level 2 Handling Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52892, 1x qapBAX102, 1x qapMUK02, 1x qapHD02-12200, 1x qapRCK52407, 1x qap52740)
	qapHK42-FMM4	QA1 94-04 Ford Mustang Level 2 Handling Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52886, 1x qapBAX104, 1x qapMUK02, 1x qapHD03-12200, 1x qapRCK52407, 1x qap52741)
	qapHK43-FMM1	QA1 79-86 Ford Mustang Level 3 Handling Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52892, 1x qapBAX104M, 1x qapMUK01, 1x qapT121W, 1x qapHD01-12300, 1x qapRCK52411, 1x qap52540)
	qapHK43-FMM2	QA1 87-89 Ford Mustang Level 3 Handling Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52892, 1x qapBAX102, 1x qapMUK02, 1x qapT121W, 1x qapHD01-12300, 1x qapRCK52411, 1x qap52540)
	qapHK43-FMM3	QA1 90-93 Ford Mustang Level 3 Handling Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52892, 1x qapBAX102, 1x qapMUK02, 1x qapT121W, 1x qapHD02-12300, 1x qapRCK52411, 1x qap52540)
	qapHK43-FMM4	QA1 94-04 Ford Mustang Level 3 Handling Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52886, 1x qapBAX104, 1x qapMUK02, 1x qapT121W, 1x qapHD03-12300, 1x qapRCK52411, 1x qap52541)

• Adjustable arms offer easy wheelbase and pinion angle adjustment
• Direct fit options for many popular GM, Ford & Mopars
• Easy, bolt-in install
• Made in the USA

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Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Tailing Arms, Boxed, Rear, Lower, Steel, Black Powdercoated, Ford, Mercury, Pair

QA1 offers upper and lower rear trailing arms for Ford and GM applications in boxed, tubular, and heavy-duty adjustable options. All upper tubular and lower boxed trailing arms use polyurethane bushings on both ends, while upper adjustable and lower tubular trailing arms use a spherical ball or rod end assembly on the chassis end to eliminate bushing bind, allowing the suspension to move smoother for better control. They are powdercoated or zinc plated and anodized for a long-lasting finish. Keep your tires planted firmly on the ground for improved traction and a more predictable, better handling car with a set of QA1 rear trailing arms.

Features may include:
• Boxed trailing arms are constructed from 0.120 in. wall cold rolled steel tubing for maximum strength and flex elimination.
• Tubular trailing arms are constructed from 1 1/4 in. diameter, 0.120 in. wall steel tubing which offers increased strength over other designs, but also have the added advantage of lighter weight.
• Boxed and tubular styles feature fluted, greasable polyurethane bushings, which are superior to the stock rubber bushings.
• Heavy-duty adjustable trailing arms allow easy rear suspension adjustments for optimum handling and traction. Simply loosen the jam nuts and adjust the pinion angle without removing the arms from the vehicle. They replace soft OE differential bushings with polyurethane differential bushings, and they use a spherical ball or rod end assembly with UHMW polyethylene bushings on the chassis end
• Adjustable styles are available in aluminum and steel options