H&R Sport Cup Kit – BMW 128i / 135i / 135is (E82)

OVERVIEW

An H&R Cup Kit is a complete suspension package: springs and shocks designed and engineered together as one system rather than mixed from two catalogs. The Sport Cup Kit is the more aggressive of the two Cup Kits — more drop and a firmer performance bias, for the enthusiast who wants a little more than the Touring kit gives.

On the E82/E88 1 Series it drops the car roughly 2.2 inches at the front and 1.5 inches at the rear, with the factory-lowered 135is dropping considerably less. H&R tunes the shocks around the spring rates so the kit keeps usable ride comfort despite the extra drop, while cutting body roll and improving chassis balance.

H&R builds every spring in-house in Germany. The wire is a special 54SiCr6 spring steel, cold-wound and then shot-peened to increase service life by more than 200%, so the spring resists settling and sagging over time. Each spring is 100% tested before it leaves H&R's ISO 9001-certified plant, and the range carries TÜV approval.

SPECS

• Approx. front lowering: 2.2" (E82 / E88), 1.2" (E82 135is)
• Approx. rear lowering: 1.5" (E82 / E88), 0.5" (E82 135is)
• Matched spring-and-shock package engineered together by H&R
• Performance-biased damper and spring tuning (Sport specification)
• Progressive spring rates, increased approximately 10–20% over stock
• Cold-wound from 54SiCr6 spring steel
• Shot-peened to increase service life by more than 200%
• Will not settle or sag
• Every spring 100% tested before leaving H&R's ISO 9001-certified production facility in Germany
• TÜV and ISO 9001 quality assurance certification

PARTS INCLUDED

• Complete kit as supplied by H&R Springs; see the installation instructions for the full bill of materials.

TECH RESOURCES

Additional Parts Required

• Four-wheel alignment. H&R requires the alignment to be checked and reset after installation. Budget for this before ordering.
• Professional installation. H&R states its springs and suspensions should be installed by professional suspension mechanics only.
• Bump-stop trimming. Check the trim chart in the H&R Technical Information Sheet linked below for this kit number before assembly.
• Confirm your car is not fitted with EDC / adaptive dampers. H&R does not list this kit for EDC-equipped cars.
• No matched dampers need to be bought separately — springs and shocks are supplied together as one engineered package.
• Optional: replace worn strut mounts, bump stops and dust boots while the struts are apart.

Installation

• H&R Technical Information Sheet (PDF) — ride-height measurement procedure, spring orientation and markings, bump-stop trim chart by kit number, and post-installation alignment requirements.
• H&R technical FAQ and installation guidance (hrsprings.com) — manufacturer installation questions and answers.
• H&R does not publish a vehicle-specific printed installation manual for this kit; installation follows the factory BMW suspension service procedure. Contact Speed Logic if you need help sourcing the procedure.

Notes

• Lowering figures are H&R approximations and vary with the car's options, wheel and tire package and starting ride height. Fitment for a specific coupe (E82) or convertible (E88) build should be confirmed with Speed Logic before ordering.

PART NUMBER

• 31054-6 — H&R Sport Cup Kit, BMW 1 Series E82/E88

VEHICLE APPLICATIONS