Install notes and evidence

Synergy Manufacturing source wording says: Fitments: Part # Description Recommended Tire Size 8064-10 2-Door 2.0" Rear Lift Springs 35" (37" W/Fender Flares & proper bump stop spacers ) 8064-20 2-Door 3.0" Rear Lift Springs 35" (37" W/Fender Flares & proper bump stop spacers ) 8064-30 2-Door 4.0" Rear Lift Springs 37" (40" W/Fender Flares & proper bump stop spacers ) 8064-45 2-Door 5.5" Rear Lift Springs 40" (42" W/Fender Flares & proper bump stop spacers ) 8064-60 2-Door 7.0" Rear Lift Springs 42" (44" W/Fender Flares & proper bump stop spacers ) 8064-10 4-Door 1.0" Rear Lift Springs* 33" (35" W/Fender Flares & proper bump stop spacers ) 8064-20 4-Door 2.0" Rear Lift Springs* 33" (35" W/Fender Flares & proper bump stop spacers ) 8064-30 4-Door 3.0" Rear Lift Springs 35" (37" W/Fender Flares & proper bump stop spacers ) 8064-45 4-Door 4.5" Rear Lift Springs 37" (40" W/Fender Flares & proper bump stop spacers ) 8064-60 4-Door 6.0" Rear Lift Springs 40" (42" W/Fender Flares & proper bump stop spacers ) PART # APPROXIMATE LIFT HEIGHT (2 DR JK) APPROXIMATE LIFT HEIGHT (4 DR JK) SPRING TYPE FREE LENGTH (INCHES) BLOCK HEIGHT (INCHES) SPRING RATE (INITIAL/RIDE) 8064-10 2.0" 1.0" MULTI-RATE 16.65 5.75 165/200 lb/in 8064-20 3.0" 2.0" MULTI-RATE 17.89 7.25 165/200 lb/in 8064-30 4.0" 3.0" MULTI-RATE 19.50 7.63 150/200 lb/in 8064-45 5.5" 4.5" MULTI-RATE 20.25 8.38 170/200 lb/in 8064-60 7.0" 6.0" MULTI-RATE 22.00 8.70 160/200 lb/in Please note: Measurement is over stock height for that particular model.. Treat this as a full suspension/lift planning item. Verify platform, lift height, gas/diesel/4xe/392 variant, shock or coilover package, control-arm path, alignment/caster, tire goal, bump stops, brake lines, driveline clearance, and final loaded vehicle weight before checkout.

Product-specific install PDFs or videos are not captured for this record yet. Treat this as a source gap before quote, checkout, or labor planning.

Suspension & liftsNeeds vehicle setup checkProduct image available

Synergy Manufacturing

Synergy Jeep JK Rear Lift Coil Springs

Vendor fitment: 2007-2018 JK Wrangler. Suspension & lifts fitment from the vendor source. Confirm final options and fitment on the vendor page before purchase.

Fitments: Part # Description Recommended Tire Size 8064-10 2-Door 2.0" Rear Lift Springs 35" (37" W/Fender Flares & proper bump stop spacers ) 8064-20 2-Door 3.0" Rear Lift Springs 35" (37" W/Fender Flares & proper bump stop spacers ) 8064-30 2-Door 4.0" Rear Lift Springs 37" (40" W/Fender Flares & proper bump stop spacers ) 8064-45 2-Door 5.5" Rear Lift Springs 40" (42" W/Fender Flares & proper bump stop spacers ) 8064-60 2-Door 7.0" Rear Lift Springs 42" (44" W/Fender Flares & proper bump stop spacers ) 8064-10 4-Door 1.0" Rear Lift Springs* 33" (35" W/Fender Flares & proper bump stop spacers ) 8064-20 4-Door 2.0" Rear Lift Springs* 33" (35" W/Fender Flares & proper bump stop spacers )...

SKU

8064-XX

Price

$310

Role

review candidate

Preview on my Jeep Vendor/source

Fitment and build notes

Vendor catalog record promoted for browsing. Final fitment, install dependencies, and shopper selection still require review before checkout.

For a lift, the last check is the complete Jeep setup: exact year/model/trim, doors, engine, lift variant, target tire size, wheel width and offset/backspacing, bump stops, flare/fender clearance, gearing, spare support, added bumper/cargo weight, and whether a shop is installing it.

Readiness

Fitment statusUseful for a shortlist, but exact vehicle setup, dependencies, or purchase path still need review.Needs vehicle setup check

Evidence levelNeeds source collection and claim-level review before it should be treated as recommendation-ready.Evidence review needed

Install docsNo product-specific install PDF, install support link, or official video is captured for this record yet.Source needed

Product imageProduct image available

Purchase pathUse for build planning or a shop quote

Visual prioritymedium

Source-backed facts

Fact summary

Models: JK Wrangler; Years: 2007-2018; Source: xcart_html; Captured: 2026-05-12