HSD Dualtech Coilovers Nissan 350Z Z33 02-09

HSD Dualtech Coilovers for Nissan 350Z Z33 (02-09) – 14-Way Twin-Tube Damping, Full Height Adjustment

The HSD Dualtech kit replaces the worn or soft factory dampers on your Nissan 350Z Z33 with four fully adjustable twin-tube coilovers built specifically for this car. It is HSD's road-focused range: a big step up in body control and steering response over standard suspension, while keeping a ride you can live with every day and the option of the odd track day.

The 14-way damping adjuster lets you go from a softer road setting to a firmer track setting in a few clicks. Ride height is set by screwing the damper body up or down, separately from spring preload, so you can lower the car without losing suspension travel or changing how the spring behaves.

At the rear the kit keeps the Nissan's separate spring-and-damper layout, using an OEM-style spring in a height-adjustable HSD seat. At the rear this kit converts the car to a true coilover, with the spring mounted on the damper rather than in the factory separate spring position, which gives a wider choice of spring rates.

Specifications

• Damper type: low gas-pressure twin-tube
• Damping adjustment: 14-way, soft to hard
• Spring pack: Default
• Front spring: 10kg/mm (approx. 98 N/mm), 200mm long, 65mm ID
• Rear spring: 11kg/mm (approx. 108 N/mm), OEM-style rear 'bulb' spring that sits in the standard spring seat
• Adjustment: Height and Damping
• HSD part number: HSD8-DT-N12

Key Features

• 14-way adjustable twin-tube dampers with low gas pressure for a compliant road ride
• Full-length height adjustment, separate from spring preload, so you keep full damper stroke when lowered
• 6061 aluminium top mounts and spring seat collars
• Zinc-plated damper bodies with e-coated lower mounts and full-length dust boots for corrosion protection
• Designed as a bolt-on kit for this car, with spares and rebuild support through the UK distributor

What's in the Kit?

• 4 x HSD Dualtech coilovers
• 2 x C-spanners for height and preload adjustment
• 1 x set of fitting instructions
• 2 x HSD stickers

Please note: the HSD feature graphics in the gallery are illustrations of the range; the coilovers supplied are specific to this car.

Fitment

• Nissan 350Z Z33 (2002-2009)

Not suitable for: Any model not listed above.

Installation

The kit is a direct replacement for the standard dampers and springs on the Nissan 350Z Z33, using the factory mounting points with no cutting or drilling. At the rear, the spring goes back in the factory spring position on the HSD height-adjustable seat, and the damper replaces the original. At the rear the spring moves onto the damper, so the factory rear spring is not reused. Set an even ride height side to side using the body adjustment rather than the preload collars, tighten every lock ring, then have a full four-wheel alignment done. Check the ride height and that all bolts and lock rings are tight again after the first few hundred miles. We recommend professional fitting by a garage with spring compressors and alignment equipment.

Can I get different spring rates?

This kit comes with 10kg front and 11kg rear springs. HSD springs are available in a wide range of rates, so contact us if you need a custom set-up for track use.

Does this kit fit my car?

HSD lists this kit for the Nissan 350Z Z33 (2002-2009). Not suitable for: any model not listed above.

Can I adjust the alignment with these coilovers?

This kit does not include camber adjustment, so use adjustable arms if you need more camber change. A four-wheel alignment is needed after fitting.

What is the difference between HSD Dualtech and MonoPro?

Dualtech uses 14-way twin-tube dampers and is aimed at road cars with occasional track use. MonoPro uses 16-way high gas-pressure monotube dampers that stay consistent when driven hard, and suits regular track days.

Can I lower the car without changing the spring preload?

Yes. HSD coilovers adjust ride height by screwing the damper body in its lower mount, separately from the spring preload collar, so you keep the same spring behaviour and damper travel.

Do I need a wheel alignment after fitting?

Yes. Changing ride height alters toe and camber, so a full four-wheel alignment is needed after fitting and after any big height change.

Are these coilovers road legal?

Yes, they are designed for road use. Lowering is a modification, so tell your insurer, and keep enough ground clearance and suspension travel for UK roads.

What warranty do HSD coilovers have?

HSD coilovers are covered by a 12-month warranty against defects in materials and workmanship. Spare parts, springs and rebuild support are available through the UK distributor.