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

Start build with this part Vendor/source

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Question

What lift height is this for?

Suspension lift height

This is a 2.5-3 inch lift-height family. Verify the exact engine, drive side, spring-capacity variant, and loaded vehicle weight before quoting because those choices can change final stance.

Sources

- Synergy Manufacturing product page: https://www.synergymfg.com/jeep/jeep-jk/suspension-parts/synergy-jeep-jk-rear-lift-coil-springs.html

- Source text: 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..

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