Posts Tagged ‘ Polyurethane ’

Poly Exhaust Mounts Now Available


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Having now tested these exhaust mounts for fit, they have also undergone successful road and track testing and we are pleased to be able to offer them for sale.

Powerflex Exhaust Mount

Powerflex Exhaust Mount

These uprated exhaust mounts are manufactured in a high temperature polyurethane material with a Shore A hardness of 67, compared to the original rubber mounts which measured 55 Shore A.

They are much stronger, more durable, with much less flex due to the material type and a reduction in the size of the centre cut-out, offer far greater resistance to tearing and rot resulting in much less exhaust movement. OE Exhaust Rubbers are prone to cracking and failing, quite often causing an exhaust knock often most noticeable on start up.

An inexpensive and worthwhile upgrade. The number required per car will vary but this mount will suit Astra G, Astra H, Vectra B, Vectra C, Meriva A, Meriva B, Signum, Omega, Corsa C, Tigra B, Zafira A and Zafira B where 90466688 is specified.

Note: This mount cross references to OE Part Number 90466688

Priced at £6.60 each

Uprated Exhaust Mounts


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We have noticed that the universal exhaust rubber/mount used on many many popular Vauxhall/Opel applications including Astra H VXR, is not very strong and over time has a tendency to perish, stretch and split, consequently requiring replacement. Often failure can occur quite quickly, especially on a modified car.

Added to this on performance models and modified vehicles with larger diameter exhaust systems, any exhaust movement in the rubber exhaust mounts can lead to knocking from time to time, especially when the mounts start to fail.

Have you ever noticed the occasional knock on start up, or from time to time when driving? This could be an indication of the first signs of weakening rubber exhaust mounts. So worth giving them a checkover at the first signs of a problem.

So we approached our friends at Powerflex to look at a solution for us. Because none of their universal exhaust mounts were close enough in size to the Vauxhall/Opel rubber mount, they set about making a polyurethane exhaust mount as a replacement.

Powerflex Exhaust Mount

Powerflex Exhaust Mount

They have looked at the OE item and manufactured a replacement, which is slightly larger overall but retaining the factory dimensions internally, in their high temperature polyurethane material with a Shore A hardness of 67, compared to the original rubber mounts which measured 55 Shore A.

The result is a much stronger, more durable mount with much less flex, offering far greater resistance to tearing and rot. Ideal for any standard or modified fast road vehicle; these exhaust mounts are equally at home on the track too.

An inexpensive and worthwhile upgrade. The number required per car will vary but this mount will suit Astra G, Astra H, Vectra B, Vectra C, Meriva A, Meriva B, Signum, Omega, Corsa C, Tigra B, Zafira A and Zafira B where 90466688 is specified.

Note: This mount cross references to OE Part Number 90466688

Gearbox Side Engine Mount Poly Insert – Astra G Zafira A Z20LET 2.0 Turbo


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The gearbox side engine mount (left had side mount) on Astra G/Zafira A 2.0 Turbo models is prone to failure caused by splitting, especially given the age of some of the rubber mounts. This polyurethane insert compliments our other uprated engine mounts and polyurethane inserts, and simply sleeves over the exiting factory OE side engine mount.

Inserts are an effective way of reducing engine movement, aiding power delivery and reducing damage to exhaust downpipes and other hoses and improving handling with less engine movement to unsettle a car during braking and cornering.

Additionally for fast road and trackday use the ability to strengthen this factory mount will reduce its movement.

The gearbox insert fits Astra G 2.0 petrol turbo engines (Z20LET)and Zafira A 2.0 Petrol Turbo (Z20LET) with the F23 gearbox

This mount is available in Yellow Material with a shore hardness of 70 for fast road use and light track use and in the new Black Material with a shore hardness of 95 (recommended only for race and dedicated trackday use)

Priced at £27.54 (Yellow – Shown Below)
and £30.30 (Black Series)

Poly Gearbox/Side Engine Mount Insert

Poly Gearbox/Side Engine Mount Insert

Powerflex Black Series Poly Bushes


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Powerflex Black Series Logo

Powerflex Black Series Logo

Powerflex Black Series range has been developed for ultimate performance, motorsport, track and race applications offering the most precise and accurate alignment for a wide range of chassis.

Designed for the Track – Ready to Race – Engineered to be the best.

Powerflex Black Series bushes are manufactured using a 95 Shore A compound to provide maximum control of chassis geometry.

This compound can be up to 80% more resistant to load than standard rubber and 25% stiffer than our purple performance material.

If your requirements are purely for the ultimate in handling and chassis performance then Powerflex Black Series are unique, offering the most precise and accurate alignment for your chassis.

Performance – Developed for ultimate performance using the toughest materials.

Precision – Engineered for the most accurate control of chassis geometry.

Practical – Manufactured to be easily fitted without the need for special tools.

All popular purple bushes are available in the new material including wishbone bushes and engine mounts

Astra H/Zafira B Front Wishbone Bushes

Astra H/Zafira B Gearbox Side Mount Insert

Astra H/Zafira B Front Engine Mount Insert

Astra G/Zafira A Front Wishbone Bushes

Poly Gearbox/Side Mount – Astra H/Zafira 2.0T, VXR and CDTi


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We identified a weakness in the gearbox mount (left had side mount) on Astra H VXR and CDTi models, whereby these are prone to failure caused by splitting. Additionally for fast road and trackday use the ability to strengthen this factory mount will reduce its movement.

With Powerflex we have now produced an insert which compliments other uprated engine mounts and polyurethane inserts.

Inserts are an effective way of reducing engine movement, aiding power delivery and reducing damage to exhaust downpipes and other hoses and improving handling with less engine movement to unsettle a car during braking and cornering.

The gearbox insert fits Astra H 2.0 petrol turbo engines (Z20LEL, Z20LER), Astra H VXR (Z20LEH), Astra H 1.9 CDTi Models (Z19DTx) and Zafira B 2.0 Petrol Turbo (Z20LER), VXR (Z20LEH) and 1.9 CDTi (Z19DTx).

This mount is available in Yellow Material with a shore hardness of 70 for fast road use and light track use and in the new Black Material with a shore hardness of 95 (recommended only for race and dedicated trackday use)

Priced at £27.54 £24.00 (Yellow – Shown Below)
and £30.30 £27.00 (Black Series)

Poly Gearbox/Side Engine Mount Insert

Poly Gearbox/Side Engine Mount Insert

The Courtenay Sport Blog


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