Overkill Performance UK

Overkill Performance UK Specialists in high performance vehicles and modifications. We are offer excellent custom fabrication of exhausts, to complete engine rebuilds and repairs.
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With over 15 years of experience we know where to find and make more power.

18/07/2026

What a transformation on this B7 RS4!

As Dave explains, we fabricated a full valved exhaust system for this car with ground clearance in mind. The customer wanted a deeper tone than other aftermarket exhaust systems. What do you think, did we achieve it? Let us know in the comments below!

Is the G81 M3 the perfect all-round car? On the track on Saturday and off on holiday with the family on Sunday!This part...
13/07/2026

Is the G81 M3 the perfect all-round car? On the track on Saturday and off on holiday with the family on Sunday!

This particular G81 now has even more of a split personality thanks to one of our custom OPF-back valved exhaust systems. Every exhaust system is custom-made for each individual car, meaning you can choose the style of exhaust tips that best suit your taste.

Finished off with a full kit, this G81 looks every bit as aggressive as it sounds.

Get in touch if you want a custom exhaust system for your G81 or any G-chassis BMW.

08/07/2026

How good does that sound! 🔉

After we posted photos of this car last week with its new custom cat-back, equal-length system featuring the Z-pipe, we received a few comments and messages asking us how it sounded. So, here it is!

The first clip is with the valves closed, followed by a few clips with the valves open, including some fly-bys. We hope you can hear from this video how the tone of the S58 has changed, partly thanks to the Z-pipe we fitted.

Let us know what you think of the sound of this G82 M4 in the comments below!

Did you know we're an dealer?Whether you're a business building a customer's car or an individual looking to purchase a...
06/07/2026

Did you know we're an dealer?

Whether you're a business building a customer's car or an individual looking to purchase a turbo directly, we're here to help.

On display, from left to right:

• Turbosmart 6870 with the B cover
• Turbosmart 6870 with the larger C cover
• Turbosmart 8280, capable of producing over 1,400 hp

If you have any questions about these turbos or would like to discuss any other Turbosmart products, don't hesitate to get in touch.

29/06/2026

We've built a top-mounted turbo kit that's paired with a Precision 7275 turbo! Along with this, it features dual 38 mm wastegates, a T4 twin-scroll manifold, a 3½-inch downpipe, and a 3-inch boost pipe. 🔥

Once mapped, this 540i will be making over 1,000 hp. The setup we've built allows everything to flow nice and easily, helping this car produce some serious power.

G80 already have enough power from stock, but eventually everything gets boring. This is where the top mount single turb...
21/06/2026

G80 already have enough power from stock, but eventually everything gets boring. This is where the top mount single turbo conversion comes in, big turbo, big power and big smiles. What more do you need 🔥

Back again with this 1.8t AWD swapped beast of a Ford KA. What a monster of a build 🔥
18/06/2026

Back again with this 1.8t AWD swapped beast of a Ford KA. What a monster of a build 🔥

Address

Mount Mill Farm
Milton Keynes
MK196DG

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm
Saturday 9am - 1pm

Telephone

+441908382899

Website

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