The Project

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The Project The Project designs/supply performance parts for Subaru GC8 Road and Rally cars - specialising in S5 WRC Carbon Panels that are class leading and unrivalled.
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Another order out the door late last week. This time one of our boot-lids and bonnets with the S5 WRC vents pre-fitted. ...
03/11/2026

Another order out the door late last week.

This time one of our boot-lids and bonnets with the S5 WRC vents pre-fitted.

Send us a DM if you are interested on info and pricing. Call it an early Xmas present to yourself 😜

#555

And then the final piece of the Twintex puzzle… The front arch liners.We supply Twintex arch liners with our S5 panels, ...
30/10/2026

And then the final piece of the Twintex puzzle… The front arch liners.

We supply Twintex arch liners with our S5 panels, but for my car, I had to modify them slightly to suit the front under guards that I had developed.

I won’t bore you with the details… But yes, it was months of card templates and CAD work etc., etc. These have been exceptionally difficult to get 110% perfect, but I am really pleased with how they turned out in the end.

With the front under-guards already bolted up in place and the front bumper back in position, the arch liners were offered up. I made some clever, card brackets for finding the blind holes in the mounting brackets behind the liners… Drilled the holes… Offered them up and bolted them into place. Hey Presto!! Absolutely spot on!

After three months at this, I’m very glad to say that my this is the end of the development of the Twintex parts 😁😁

#555

Following on from the last post, this shows the development of the PS, front under-guard.This was an absolute head melte...
29/10/2026

Following on from the last post, this shows the development of the PS, front under-guard.

This was an absolute head melter to develop. Unlike the other side, it was a lot more of a complicated shape, as I need clearance for the relocated, engine fusebox that is now mounted down on the inner flitch.

This needs to be incredibly watertight, with all the electrics now housed here, so the design had to be very detailed and precise to completely close off this area.

After a huge amount of card templates, hours of CAD work… it was time to get the final version Waterjet cut in Twintex. Same process as before with heat, bending, and a slightly more complicated aluminum bracket… welded on brackets on the chassis leg with some M6 rivnuts fitted etc… and it bolted up perfect… and it gives a solid fixing for the front edge of the Twintex arch liner to attach to.

I have to say… I’m really pleased with how this turned out. It’s completely closed off this area and made it really water tight… but looks almost OEM too 😍

#555

The next two posts show the development of non-S5 specific, twintex parts. This has been months of work 😮‍💨This post sho...
28/10/2026

The next two posts show the development of non-S5 specific, twintex parts. This has been months of work 😮‍💨

This post shows the development of the DS front under guard that closes off between the bumper and chassis leg.

Before starting on it, I decided to fit a 3” vent, which will feed cold air to the airbox, through a Samco 90° pipe.. this first required a metal infill piece in the flitch panel, for the black 3” air duct.

Then after hours of card templates and CAD work, I was able to finalize the shape and design of the under guard. Once water-jet cut and heat bent into shape, I came up with an aluminum bracket that would be attached to it with rivets to keep it rigid for attaching the arch liner to.

I then welded some small metal brackets to the chassis leg and fitted them with M6 rivnuts, for attaching the under guard too.

Really happy with how this piece worked out 😁

Next up the more complicated PS one….

#555

Another S5 specific Twintex part I’ve spent the last while developing. This is the air deflector that covers in the top ...
27/10/2026

Another S5 specific Twintex part I’ve spent the last while developing. This is the air deflector that covers in the top of the radiator and intercooler.

‘Rinse and repeat’ with detailed dimensions being taken, then drawn up in CAD and then loads of templates and tweaks to get the fitment right.

It was then water jet cut from Twintex and heat-bent in to shape… two M6 rivnuts were then fitted, so the side deflector plate could be bolted to it… then offered up on the car… perfect fitment!! 😁

Another Twintex part. The battery cover!! This is an S5 specific part, but is even rarer than rocking horse poo to get a...
26/10/2026

Another Twintex part. The battery cover!!

This is an S5 specific part, but is even rarer than rocking horse poo to get any info on. I have only two reference images. One basic one from the S5 parts catalogue (Part 29) and the other photo from R19 WRC during its restoration. I believe very few covers survived, with many certainly discarded over the years 😖

In the end it was designed in CAD specific to the battery retaining bracket I had previously fabricated that bolts to my battery mount.

Loads of card templates to check fitment, but hen water jet cutting of the Twintex, heat bending and then some rivets to join the front corners - and then all done!!

More to come soon….

#555

Right… so this is the main reason for the lack of updates! Twintex!!! There are quite a few twintex elements on an S5, a...
22/10/2026

Right… so this is the main reason for the lack of updates! Twintex!!!

There are quite a few twintex elements on an S5, all of which I needed to design from scratch. Along with the S5 specific parts, there was a few bespoke bits that I wanted to do for my car.

One of which was the rear infill pieces - and before you ask - they are very specific to how I did my rear tubs and won’t necessarily work on another car.

There was countless hours creating templates for these… Starting with clear PVC sheet to get the rough shape, then plotting it all in CAD and then trialing loads of card templates to fine tune fit and alignment.

Once these and all the other parts I needed in Twintex were designed, it was all sent off to be water jet cut.

Twintex is a great material in that it is as durable as hell and can be heated and bent/formed if needed. Thankfully I have access to a hot wire element for heating and creating the folds needed in the infill pieces.

Once folded they bolted up so sweetly and completely close over the gap between the rear pockets and the bumper !! 😍😍

Loads more to come on the other Twintex parts in development.

#555

Another batch of orders just finished and about to be shipped out. It’s been a very busy last few months!  Get in touch ...
21/10/2026

Another batch of orders just finished and about to be shipped out. It’s been a very busy last few months!

Get in touch with us soon, if you are keen to place an order, as production slots are filling quick!

#555

Apologies again for the lack of updates! There has been a load of work going on in the background. All very tedious and ...
20/10/2026

Apologies again for the lack of updates!

There has been a load of work going on in the background. All very tedious and small parts that have taken a huge amount of time R&D wise.

All are starting to come together and I should have more interesting content to post soon.

For now… here’s my interpretation of the S5’s boot lid stay. I believe these were originally done in alloy, but I’ve chosen to do my one in stainless steel, as I don’t have a TIG welder for welding alloy 😖

Came out pretty good I think. Just needs the M6 weld tab fitted to take the M6 bolt.

#555

Another small job off the list!So, Prodrive used a V1 STI I/C water bottle) as the washer bottle on an S5 WR car, due to...
01/10/2026

Another small job off the list!

So, Prodrive used a V1 STI I/C water bottle) as the washer bottle on an S5 WR car, due to its smaller size. Not the easiest part to find and it took me some time to source one… actually got two in the end, so I’ve one as a back-up 😜

They also used the OEM bracket too, but cut it to remove the mounting studs and then modified it to have a new plate added to it so it could be bolted to the front tub.

Anyway, with the new mounting plate drilled and some m6 weld tabs added… it was spot welded to the OEM section and then bolted to the front tub.

Anyway, that’s another pain point off the list, as it’s literally taken me over 12 months to source this part 😖

#555

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