Dežru Spec-S • Street & Touring Porsche Boxster 986 Coilover System

Balanced mid-engine control without killing the ride.

Designed to lower your 986 Boxster by approximately 25–40 mm while improving stability, steering response, and body control without making the car harsh or nervous on real roads.

Monotube shocks Nickel-plated shock bodies Vehicle Specific Spring Rates

Dežru Spec-S Coilovers – Porsche Boxster 986

The Dežru Spec-S coilover system is engineered specifically for the Porsche 986 Boxster, a lightweight mid-engine chassis that rewards balance, precision, and proper spring-to-damper matching. Designed around the Boxster’s suspension geometry, weight distribution, and street performance use case, the Spec-S improves response and composure without taking away the approachable, confidence-inspiring feel that makes the 986 so good to drive.

Developed for drivers who daily their Boxster but still enjoy spirited street driving, back 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 transitions, while remaining compliant over rough pavement and normal road imperfections.

Rather than chasing excessive stiffness, this setup targets a balanced ride frequency in the ~1.9–2.2 Hz range, improving feedback and control 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 986 Boxster to feel sharper, flatter, and more composed without becoming brittle or uncomfortable.

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.
250 lb/in front and 350 lb/in rear spring rates, selected to complement the 986 Boxster’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 986 Boxster by reducing excess body motion, improving 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 Boxster that feels sharper, more planted, and more confidence-inspiring, while still being comfortable enough for daily use and real-world roads.

Why We Recommend 250 lb/in Front & 350 lb/in Rear for the 986 Boxster

For the 986 Boxster, a 250 lb/in front and 350 lb/in rear spring rate is a balanced street-performance setup built around the car’s mid-engine layout, relatively light chassis, and excellent natural balance.

The 986 does not need an overly stiff front spring to feel responsive. Too much front rate can reduce compliance and mechanical grip, especially on uneven pavement. The 250 lb/in front spring gives the car better support under braking and turn-in while still allowing the front tires to stay connected to the road.

In the rear, the 350 lb/in spring provides the added support needed for the Boxster’s rear weight bias without going so stiff that the car becomes nervous, skittish, or uncomfortable. This helps control squat, keeps the rear platform stable, and improves confidence when applying throttle out of corners.

This pairing is designed around balance, not brute stiffness. The goal is to make the 986 feel more composed and precise while preserving the friendly, neutral character that makes the platform so enjoyable.

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 250/350 combination gives the 986 Boxster a stronger, more controlled street-performance feel while keeping the car compliant, predictable, and enjoyable every day.

Dežru Performance Suspension warrants to the original purchaser that these parts manufactured and/or sold by Dežru Performance Suspension (the product) is free from defects in material and workmanship under normal use. Dežru Performance Suspension warrants that the product will perform substantially in accordance with the specifications set forth in the documentation provided with it. The above express warranties are made for a period of the lesser of 12,000 miles or 36 months from the date the product is installed in your vehicle. Any improper use, operation beyond capacity, substitution or addition of parts not approved by Dežru Suspension in writing, any alteration or repair by others, or any removal, defacing or altering of the identification shall void this warranty. There is no warranty on high-performance or race related parts due to the nature of usage.