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★★★★★ 4.9 (625 Google reviews) · Marietta shop · 📞 (678) 400-6467 · 🗺️ Get Directions · Live From The Shop
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Rough Country · Authorized Dealer

4 Inch Lift Kit | Rear Springs | Ford F-100 4wd (1970-1976)

Part #: 500-70-76.20UPC: 843030126971Brand: Rough Country

$779.95

Price does not include installation.

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*Estimated lease-to-own payment. Final approval and terms are determined by the lender. See all financing options →

🛠️ Install available in Marietta, GA

Installed and serviced at Road Runner Wheels & Tires — 1585 Roswell Rd, Marietta, GA 30062. Call (678) 400-6467 to schedule.

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Built for Ford F-100 owners who want a bold, leveled stance and extra tire clearance without sacrificing ride quality — this 4-inch lift kit raises your truck's front end to eliminate factory rake and accommodate up to 35-inch tires. You get heavy-duty front coil springs with geometry-correcting C-bushings, application-specific rear leaf springs, and premium nitrogen-charged N3 shocks that deliver smooth performance both on the highway and off-road.

Installed and serviced at Road Runner Wheels & Tires. Most lift kits go in the same day. Call (678) 400-6467 to schedule.

What's included

  • 4-inch Front Coil Springs — Heavy-duty springs engineered to raise ride height while maintaining ride quality and factory-like handling characteristics.
  • 7-Degree C-Bushings (qty 1) — Correct caster angle and suspension geometry to preserve driveline angles and prevent premature wear.
  • Track Bar Bracket — Repositions the track bar to maintain proper suspension geometry at the increased ride height.
  • 4-inch Rear Leaf Springs (qty 2) — Application-specific rear springs deliver proper fitment, ride quality, and load-carrying support tailored to your F-100.
  • N3 Shock Absorbers (qty 2 pairs) — Nitrogen-charged, 10-stage velocity-sensitive shocks with 54mm bodies and 18mm piston rods for superior damping and durability.
  • U-Bolts & Installation Hardware — All fasteners and brackets needed for secure mounting and proper suspension alignment.

Important notes

  • This kit is designed only for Ford F-100 models equipped with 3-inch wide rear leaf springs. Confirm your truck's rear spring width before ordering.
  • To run the full 35-inch tire clearance, ensure your wheels have proper backspacing to avoid rubbing at full articulation.

Why customers pick this at Road Runner

  • Rough Country Limited Lifetime Replacement Warranty backed by our local expertise — we stand behind every kit we install.
  • Professional installation by technicians who perform lift kits on classic Ford trucks every week; alignment performed in-house as part of the job.
  • Geometry correction built in — C-bushings and track bar bracket preserve driveline angles so your truck handles like stock, just taller.
  • N3 nitrogen shocks come pre-assembled and tuned to this specific application — no guesswork, no aftermarket shock selection delays.

Ready to build it? Call (678) 400-6467. Hablamos Español.

QtyPartPart #
24in Rear Leaf Spring | Ford Bronco (78-79)/F-250 (77-79) 4WD8033
1Installation Kit | Ford Bronco (78-79) Ford F-100 (70-79)7516
1Universal U-Bolt Kit7643
14in Coils | Ford Bronco (78-79) Ford F-100 (70-79)9260
17 Degreee C Bushings | Ford Bronco (78-79) Ford F-100 (70-79)6022
1N3 Shock Pair23148
1N3 Shock Pair23282

Features

  • Enhanced Ground Clearance: Increases ride height to confidently handle off-road obstacles and uneven terrain.
  • Level Front-to-Rear Stance: Eliminates factory rake for a balanced and aggressive profile.
  • Application-Specific Rear Leaf Springs: Tailored rear springs deliver proper fitment, ride quality, and support under load.
  • Premium N3 Shock Absorbers: Nitrogen-charged shocks offer superior damping performance on and off the road.
  • 35-Inch Tire Clearance: Provides enough lift and clearance to run up to 35" tires without trimming.
YearsMakeModelDrive
1970-1976FordF-100 Base4WD
1975-1976FordF-100 Custom4WD
1975-1976FordF-100 Northland4WD
1975-1976FordF-100 Ranger4WD
1975-1976FordF-100 Ranger XLT4WD
1976FordF-150 Base4WD
1976FordF-150 Custom4WD
1976FordF-150 Northland4WD
1976FordF-150 Ranger4WD
1976FordF-150 Ranger XLT4WD
  • Tire size: 33″ to 35″ tall
  • Lift height: 4″
TireWheelOffset
35x12.50R15Factory 15-mm
33x12.50R1515x8-19mm
33x12.50R1515x8-18mm
33x12.50R1515x10-39mm
35x12.50R1818x9-12mm
33x12.50R1818x9-12mm
295/70R1818x9-12mm
285/75R1818x9-12mm
295/70R1818x10-25mm
35x12.50R2222x10-25mm
  • Install time: 5-7 hours
ONLY fits models with 3-inch wide rear leaf springs.

Rough Country Lifetime Replacement Warranty covers all structural components against defects in materials and workmanship for the original purchaser's lifetime ownership of the vehicle.

3-Year Finish Warranty on all painted and powder-coated surfaces.

3-Year Shock Warranty on N3, M1, and Vertex shocks against leakage and structural failure.

Warranty service is handled by Rough Country directly — call (678) 400-6467 if you need help opening a warranty claim and we'll walk you through it.