Balanced mid-engine control without killing the ride.
Designed to lower your 987 Boxster/ Cayman by approximately 25–40 mm while improving stability, steering response, and body control without making the car harsh or nervous on real roads.
Dežru Spec-S Coilovers – Porsche Boxster / Cayman 987
The Dežru Spec-S coilover system is engineered specifically for the Porsche 987 Boxster and Cayman, a lightweight mid-engine platform that responds extremely well to proper spring rate selection and digressive damper tuning. Designed around the 987’s suspension geometry, weight distribution, and dual-purpose street performance intent, the Spec-S improves response, stability, and chassis composure without making the car harsh or unpleasant to drive every day.
Developed for drivers who daily their 987 but still enjoy spirited street driving, mountain roads, canyon roads, and occasional HPDE use, the Spec-S features digressive piston valving that provides strong low-speed support during braking, turn-in, and transitional maneuvers, while remaining compliant over rough pavement and real-world road imperfections.
Rather than chasing excessive stiffness, this setup targets a balanced ride frequency in the ~2.0–2.3 Hz range, improving control and feedback while preserving the ride quality expected from a road-driven Porsche.
Fixed-length damper bodies paired with a 25–40 mm adjustable lowered ride height help preserve usable suspension stroke and predictable roll behavior, allowing the 987 to feel sharper, flatter, and more composed without becoming brittle or nervous.
Key Features
-
Digressive monotube dampers for controlled body motion, consistent damping performance, and clear steering feedback.
-
Fixed-length damper bodies with 25–40 mm adjustable lowered ride height to preserve suspension geometry and usable travel.
-
Adjustable damping to fine-tune rebound for daily driving, back-road use, or HPDE track events.
-
300 lb/in front and 400 lb/in rear spring rates, selected to complement the 987’s mid-engine balance while maintaining front grip, rear stability, and ride compliance.
-
Linear HyperCoil springs for predictable load transfer and smooth, consistent response throughout suspension travel.
-
OEM-style upper mounts to reduce NVH while maintaining proper fitment and alignment consistency.
-
Hand-built, dyno-matched pairs to ensure precise left-to-right damping consistency.
Performance Character
The Spec-S transforms the Porsche 987 Boxster and Cayman by reducing excess body motion, improving steering response, and giving the chassis a more settled, precise feel. The digressive damping profile delivers immediate support during initial inputs while maintaining enough compliance to keep the tires working over imperfect surfaces.
The result is a 987 that feels sharper, more planted, and more confidence-inspiring, while still being comfortable enough for daily use and real-world roads.
Why We Recommend 300 lb/in Front & 400 lb/in Rear for the 987
For the Porsche 987 Boxster and Cayman, a 300 lb/in front and 400 lb/in rear spring rate is a balanced street-performance setup built around the car’s mid-engine layout, improved chassis rigidity, and higher performance ceiling compared to the earlier 986 platform.
The 300 lb/in front spring gives the car better support under braking and sharper response during turn-in without overloading the front tires or making the steering feel nervous over rough pavement. The goal is to improve precision while still allowing the front suspension to work.
In the rear, the 400 lb/in spring provides the additional support needed for the 987’s rear weight bias and mid-engine traction demands. This helps control squat, improves rear stability, and keeps the car composed when applying throttle out of corners.
This pairing is designed around balance, not brute stiffness. The 987 does not need excessive spring rate to feel serious. It needs the right spring rate matched to the right damping curve.
The result is a setup that:
- Improves steering response and turn-in
- Reduces excess body roll and float
- Maintains front-end grip over imperfect roads
- Adds rear support without making the car twitchy
- Works with the digressive valving instead of relying on excessive spring stiffness
Overall, the 300/400 combination gives the 987 Boxster and Cayman a stronger, more controlled street-performance feel while keeping the car compliant, predictable, and enjoyable every day.
