ST XTA Coilovers Vauxhall Astra H 04-13

ST XTA Coilovers for Vauxhall Astra H (2004-2013) – 20-60 mm Lower, Height & Rebound Adjustable, Camber Top Mounts

This ST XTA kit replaces the standard springs and dampers on the Vauxhall Astra H (2004-2013) with a height-adjustable coilover set. It lowers the car by approx. 30-60 mm at the front and 20-45 mm at the rear, which sharpens the steering, cuts body roll and closes up the wheel arch gap. The ride height is set on threaded struts, so you can go for a subtle drop or use the full approved range, and change it again later.

The ST XTA is ST's fast road and track day coilover. As well as stepless height adjustment and 16-click rebound damping, it comes with Unibal (spherical bearing) top mounts on the front axle, so you can adjust front camber after the coilovers are fitted to get more of the tyre on the road in corners and sharper turn-in. It uses a race spring system: a linear main spring for consistent, predictable behaviour, supported where needed by a helper spring that keeps the main spring seated at full droop. ST is part of the KW automotive group, and the kit is developed and made in Germany using KW engineering.

This kit is for the Vauxhall Astra H (Saloon / Estate) with the 1.2, 1.3 CDTI, 1.4, 1.6, 1.6 Turbo, 1.6 i 16V, 1.7 CDTI, 1.8 and more, up to a 1075 kg front axle load. Check the Fitment section below before ordering.

Specifications

• Front lowering: approx. 30-60 mm
• Rear lowering: approx. 20-45 mm
• Max front axle load: up to 1075 kg
• Max rear axle load: up to 1000 kg
• Height adjustment: Stepless, on threaded strut housings
• Minimum ride height (wheel hub centre to arch edge): front 325 mm, rear 335 mm
• Damping: Adjustable rebound, 16 clicks
• Springs: Linear main springs with helper springs where needed
• Top mounts: Front Unibal mounts with camber adjustment
• Strut housings: Galvanised steel
• Approval: Parts certificate (German §19.3)

Lowering figures are ST's, measured against the standard car. The actual drop varies with engine, equipment and tolerances on each car, and the springs settle slightly after the first few hundred miles.

Key Features

• Front Unibal top mounts with camber adjustment after fitting
• 16-click adjustable rebound damping, delivered with a base setting for this vehicle
• Stepless ride height adjustment on a coarse, dirt-resistant trapezoidal thread
• Race spring system with linear main springs for consistent, predictable handling
• Galvanised, multi-sealed steel strut housings for long-term corrosion protection
• Composite spring perches with stainless steel inserts that stay easy to adjust for years
• Dust covers and bump stops protect the damper seals
• Developed and built in Germany, based on KW engineering
• Supplied with a parts certificate and fitting instructions

What's in the Kit?

• 2 x height-adjustable front coilover struts with springs
• 2 x rear dampers
• 2 x rear springs with height-adjustable spring seats
• 2 x front Unibal top mounts with camber adjustment
• Composite spring perches with stainless steel inserts
• Dust covers and bump stops
• Parts certificate and fitting instructions

Please note: the photos are ST's own images of this kit. Small details such as brackets can differ from the photos.

Fitment

• Vauxhall Astra H A04, A (Jan 2004 to Jan 2011)
• Vauxhall Astra H Estate A04, A (Aug 2004 to Oct 2010)
• Vauxhall Astra H Saloon A04, A (Feb 2007 to Dec 2013)
• Vauxhall Astra H TwinTop A04, A (Sep 2005 to Dec 2013)
• Vauxhall Astra Mk V H (Jan 2004 to Mar 2011)
• Vauxhall Astra Mk V H (Aug 2004 to Oct 2012)
• Vauxhall Astra Mk V H (Sep 2005 to Aug 2011)
• Engines: 1.2, 1.3 CDTI, 1.4, 1.6, 1.6 Turbo, 1.6 i 16V, 1.7 CDTI, 1.8, 1.9 CDTI, 1.9 CDTI 16V, 2.0, 2.0 Turbo

Not suitable for: Cars with self-levelling suspension, unless the levelling system can be reset to suit the new ride height. Also not for other generations or body styles, which need their own kit, such as ST XTA Coilovers Vauxhall Astra GTC H 05-10, ST XTA Coilovers Vauxhall Astra TwinTop H 06-13.

Adaptive dampers: if your car has electronically controlled dampers, the system must be switched off with a cancellation kit (sold separately) to stop warning lights and fault codes: electronic damping: KW cancellation kit (part no. 68510175) (68510175 for all except OPC/VXR models, 68510228 for OPC/VXR); electronic damping: KW cancellation kit (part no. 68510228) (68510175 for all except OPC/VXR models, 68510228 for OPC/VXR).

Installation

Fitting means removing the original struts, springs and dampers and fitting the ST units in their place. We recommend a qualified workshop experienced with coilovers. The Unibal top mounts replace the original front top mounts. Set the ride height within the approved range, tighten the suspension bolts with the car's weight on its wheels, and torque everything to the manufacturer's figures. A four-wheel alignment is required once the car is at its final ride height. Re-check the height and alignment after the first few hundred miles, once the springs have settled.

Download ST's documents for this kit: Fitting instructions (PDF), Parts certificate (PDF), Damper adjustment guide (PDF).

Set the front camber on the Unibal top mounts before the alignment, and start with the rebound adjusters on ST's base setting.

Before you start:

• With the factory wheels and tyres, wheel spacers may be needed to give enough clearance to the coilovers.
• On the original wheel sizes, wheel spacers may be needed to keep enough clearance.
• Disconnect any ride height sensors (headlight levelling or self-levelling) before removing the old struts.
• Clean the threads before adjusting, and start with the height adjusters in the middle of their range.

After fitting:

• Do not go below ST's minimum height, measured from the wheel hub centre to the wheel arch edge: front 325 mm, rear 335 mm.
• Expect the car to settle a further 5-10 mm once it has been driven, then re-check the height.
• Check there is at least 5 mm clearance between the tyres and the suspension through the full steering and suspension travel.
• Have the headlight aim reset, along with any other height-dependent systems.
• ESP/ABS warning lights can appear after fitting. Some clear after a short drive, others need full steering lock both ways or a reset with a diagnostic tool.
• On cars with radar or camera driver assistance systems, have the calibration checked after lowering.

Upgrade Further

If you only need height adjustment, the ST X Coilovers Vauxhall Astra H 04-13 has fixed damping and costs less.

Will this fit my Vauxhall Astra H?

It fits the Vauxhall Astra H (2004-2013) with the 1.2, 1.3 CDTI, 1.4, 1.6, 1.6 Turbo, 1.6 i 16V and more. Check the Fitment section for the body styles and exclusions, or send us your registration and we will check.

How low will my Vauxhall Astra H sit?

ST quotes a drop of approx. 30-60 mm at the front and 20-45 mm at the rear compared with standard. The exact drop varies from car to car with engine, equipment and tolerances. ST also sets a minimum: the distance from the wheel hub centre to the wheel arch edge must stay above approx. 325 mm at the front and 335 mm at the rear.

Can I adjust the damping?

Yes. The rebound adjuster has 16 clicks and the kit arrives on ST's base setting for this car. Turn towards firm for tighter body control or towards soft for a more comfortable ride.

Will the ST XTA make my Vauxhall Astra H ride harshly?

The XTA is the sportiest ST kit, with linear race springs, so it is noticeably firmer than standard. The 16-click rebound adjuster lets you take some of the edge off for road use, but it is aimed at fast road and track day cars.

Do I need an alignment after fitting?

Yes. Changing the ride height changes camber and toe, so a full four-wheel alignment is needed once the car is at its final height, and again after any later change. With the XTA you can also set front camber on the top mounts.

My car has adaptive dampers. Will this kit fit?

Only with the correct KW cancellation kit, which switches off the electronic damper control so no warning lights appear. The kit number is in the Fitment section. Some versions are not suitable for adaptive dampers at all, so contact us if you are unsure.

Will my standard wheels fit?

On the original wheel sizes, ST says wheel spacers may be needed to keep enough clearance. Aftermarket wheels should be checked for clearance at your chosen ride height.

Is it road legal in the UK?

Yes. It is designed for road use and comes with a German parts certificate. Keep the ride height within ST's approved range and tell your insurer about the modification.

Is it covered by a warranty?

Yes, ST covers it against defects in materials and workmanship. If a part ever needs replacing, contact us with your vehicle details and order number.