Infiniti – D2 Racing Sport Coilover Kits

Summary & Key Benefits

D2 Racing Sport coilovers for Infiniti platforms balance premium comfort with sharper dynamics. Applications include G35/G37 (V35/V36), Q50 V37, Q60, FX/QX70 (S50/S51) and M35/37 (Y50/Y51). The 36-step damping window and lower-mount height adjustment preserve spring travel, making it easy to adapt the chassis to tyres, road quality and occasional track days.

Technical Basics

A coilover uses a threaded damper body, spring, adjustable lower mount and a model-specific top mount. Adjusting ride height at the lower mount maintains preload and travel. Many MacPherson applications accept camber plates for alignment targets. Materials include SAE9254 spring steel and 6061 aluminium for strength with low weight.

Platform notes: on V37 Q50/Q60 verify anti-roll link and ABS/loom bracket positions; SUVs like S50/S51 benefit from firmer settings to control mass. Cars with factory adaptive damping may require a cancellation accessory to prevent warnings.

Selection Criteria

Select exact fitment—G35/G37 V35/V36, Q50 V37, Q60 CV36, FX/QX70 S50/S51, M-series Y50/Y51. For commute-first builds choose rubber top mounts; for time-attack choose pillowball mounts. Start damping mid-range and adjust 1–2 clicks at a time based on tyres and conditions.

Streetable drop is roughly -50 to -60 mm from OE. Excessive lowering harms geometry and reduces travel; wide wheels require clearance checks. If more negative camber is needed, add plates up front and eccentric bolts or adjustable arms at the rear.

Installation & Maintenance

Clean mating faces and protect threads with copper grease. Set height via the lower mount to avoid excessive preload and noise. Torque to OE specifications and carry out a full wheel alignment once the car settles.

After spirited use, re-torque hardware, check dust boots and reassess damping as tyres heat-cycle. If rattles appear, revert to baseline and inspect mounts and spring guidance; a spring bearing can improve rotation.

FAQ

Are these comfortable enough for a Q50 daily?
Yes—36 steps of damping let you bias comfort or response. Rubber mounts feel closer to OE; pillowball options increase feedback.

How low should I go on a G37?
About -50 to -60 mm is typical for the street. Too much drop harms geometry and causes rubbing—adjust gradually.

Do I need a cancellation kit?
Some adaptive-damping cars require one to avoid warnings; confirm for your specific application.

What causes clunks at steering lock?
Often excessive preload or spring binding. Inspect mounts and consider a spring bearing.