Uprated High tensile Mains Bolts for Z20 Engine

This full set of high tensile steel bolts will ensure that your high power Z20's crank stays where it should be.

Come complete with instructions for fitment.

We use these in most of our Z20 builds, upto about 400hp

Colder than the standard "glow plugs" fitted by Vauxhall, ideal for fast road / track use.

Gap to around .7mm. If your ignition system can't handle this then try a new coil pack, or stop running it so rich!

Fresh pack of four.

Astra VXR Inline fuel filter kit.

In more recent years through testing many Astra Vxr's we have noticed that there is an issue that is becoming more of a problem on some than it is others. The issue comes about due to the fact that the Astra VXR leaves the factory with a fuel filter that is deemed fit for purpose for the life of the car – this means its a non replaceable type fuel filter, the car at standard power should have no issues running.

This is not always the case, especially more so when tuning the car to much higher levels of power or living in an area where there is a greater risk of contaminated fuel. In such a case there becomes a point where the car can no longer fuel safely. The long term effects of this can be catastrophic for the engine long term and can also lead to stress on other items of your car. Through the car being unable to adequately supply fuel in the correct quantity would suggest that the filter is blocked, this will mean that your fuel pump is overworking itself by quite a lot. The fuel system pressure is regulated at the far side of the fuel rail in order to keep the pressure maintained across all 4 injectors, this is typically 3-3.3 Bar of positive pressure without any boost in the reference port. With a blocked fuel filter its possible for the fuel system pressure to jack up further pre filter and this will cause unnecessary strain and most certainly prematurely wear out the fuel pump.

The solution

There are two solutions, one is to buy a whole new fuel pump cradle from Vauxhall themselves, this will include a new fuel pump as well as the in built filter. Not the cheapest option by far.

The second solution is to modify the existing setup in such a manner that can allow the fuel filter to be changed at more regular and appropriate service interval. This second solution also gives us the chance to replace a standard fuel filter with something more performance oriented that has a higher overall total flow capacity. The design we have ended off favouring allows the customer to connect in this fuel filter without having to cut any of the OE fuel lines under the bonnet. By installing a new in line filter in a different location. The old filter can be bypassed internally in the fuel tank and eliminated from the system. On the high power setups we will actually remove this filter from the in tank surge pot to increase the capacity, only advisable to those who feel technically confident in doing so.

Advisable to fit a new fuel pump at the time of doing the operation, one less hose to cut off. Installing a new ASNU fuel pump with new filter will ensure you better fit the criteria for fuel pump warranty, fuel pumps fitted on old filters are always void of any warranty.

The RND Astra VXR In line replacement fuel filter kit includes :-

A Bosch high flow motorsport quality fuel filter

Bracket and fixings to attach the filter to the bulkhead
Clamps and fixings to hold the filter to the bracket

Fuel fitting for the filter to take the OE fuel line from the fuel rail feed side

Fuel fitting to replace the fitting in the fuel rail

Fuel fitting for new filter far side

 ***Teflon lined PVC coated stainless braided hose to join the fuel filter to the fuel rail ***

^^^ *NEW* - Now includes main fuel line from Racing lines - Aramid motorsport fuel line ^^^

In tank fuel hose to route fuel supply from pump direct to tank lid 

We have developed this kit to be as straight forward as we can although some technical knowledge is needed, its advisable to pressure test your fuel system to above its expected working pressure upon completion of installation.

We have run nearly 600 HP through one of these filter kits without issue, we believe that this would be the top end of this filters capability and regular changes would be required at that power. Contact us for spare filters, we have plenty in stock. 

Replacement Front Boost control valve  ( BCS )  for the astra GSI and VXR 

This valve will also work on corsa D engines where there has been a KO4 conversion / a larger turbocharger has been fitted 

Installed seat pressure - 30kg 
Lift - 100kg@13mm
Max. lift - up to 13mm
Made from chrome-silicone steel SAE9254-V
16 pcs. outer springs
16 pcs. inner springs
16 pcs. titanium retainers
Fits Opel / Vauxhall 4 cylinder 2.0 16V Z20LET Z20LEH engines. 
With this set the risk of valve float and a possible engine failure is minimized.
Recommended for engines with series and racing camshafts and over 7600 RPM.
Titanium retainers are very light and strong, helps eliminate valve float. Weight is only 10g.

Turbo Brace developed for use on Nortech V band manifold - Gen1 GT28 type turbo

A turbo support is always a good idea to take some of the weight off the end of the manifold, meaning a much longer life to the manifold.  

A flexible brace type mount should alwas be used on a turbo system, as it is intensly heated, things tend to expand and contract. Solid type brace systems will only lead to cracking sooner.

This flexible support type brace for the Z20 series engine, running a Nortech V band manifold system (others TBC )  with a first generation Garrett series turbo.  Generally in this frame the compressor housing bolts seem o be imperial sizes so we will send out the apropiate bolt for your kit. 

Attaching to one of the compressor cover bolts at the side of the compressor cover most near the engine block , this brace then utilises one of the engine block RWD engine mount configuation bolts to take the weight of the core,  set up well you should be able to remove your manifold and the turbo more or less stay in place with only the brace and the downpipe.

Not having the weight of the turbo itself hung on the manifold will make a large difference in it's life.

Utilises the same quailty spherical bearing as we use in our suspension parts , full stainless steel hardware package. 

Turbo Brace developed for use on Nortech V band manifold - Gen1 GT30 type turbo

A turbo support is always a good idea to take some of the weight off the end of the manifold, meaning a much longer life to the manifold.  

A flexible brace type mount should alwas be used on a turbo system, as it is intensly heated, things tend to expand and contract. Solid type brace systems will only lead to cracking sooner.

This flexible support type brace for the Z20 series engine, running a Nortech V band manifold system (others TBC )  with a first generation Garrett series turbo.  Generally in this frame the compressor housing bolts seem o be imperial sizes so we will send out the apropiate bolt for your kit. 

Attaching to one of the compressor cover bolts at the side of the compressor cover most near the engine block , this brace then utilises one of the engine block RWD engine mount configuation bolts to take the weight of the core,  set up well you should be able to remove your manifold and the turbo more or less stay in place with only the brace and the downpipe.

Not having the weight of the turbo itself hung on the manifold will make a large difference in it's life.

Utilises the same quailty spherical bearing as we use in our suspension parts , full stainless steel hardware package. 

Z20 - Cool running Thermostat - Including housing and seal

This thermostat opens at a lower temperature than standard.

The standard thermostat regulates the coolant temperature to around 90°C, with the occasional jaunt above 100°C! This is good for emissions, but not much else.

This thermostat regulates the coolant temperature to around 80-85°C, which increases detonation resistance due to decreased charge and combustion chamber temperature.

Ideally we like to re-program the fan switching temperatures too, to take in to account the lowered running temperature. This is not strictly necessary though, the fans will just work as standard.

Adjustable alternator bracket for the Astra H VXR Z20 series engine using the standard type alternator.

This adjustable bracket allows the alternator to be rotated back approximately 20mm.

Includes all mounting hardware, all hardware is stainless steel except the  main spacer, this is aluminium and annodised black to prevent corrosion.

The bracket itself is CNC Laser cut from 4 MM thick stainless steel plate.

500HP service kit - Engine oil - gearbox oil - oil filter and plugs. 

 general service kit for a high power z20 build , more track focused and with a helical type differential.  If your car is more a daily driver then you may want to consider going to the 10-40 version of this kit. If your running more power maybe consider the  15-60W version.