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The choice is between a big power gain, and a deep, loud throaty noise, or medium power gain and a more modest sound. With a 76mm (3") bore which runs from the catalytic converter back, the Nur Spec R series are finely engineered to give good power gains on turbocharged cars.
Particular attention is paid to minimise the length of the path from the turbo to the exit pipe, which greatly helps to reduce back pressure. On the Evo this comes in the form of a very straight system rather than having several bends to follow the original exhaust path.
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Evo 9 SWB is competing in the UK Time Attack series for 2019, Keep
an eye on our social media for updates and the Norris Designs
YouTube channel for in car videos.
Version 3 supercharger kits proving themselves out there all around
the world! Zero lag!
Version 4 dry sump kits in stock and ready to ship. Featuring the
SUPERB Auto Verdi oil pump.
Colt Ralliart is competing th CCRC Saloons Championship again in
2019. Going great so far!
Designs are the UK agent for Bullet engine blocks. We stock 4G63
& 4G64 versions. As used in our Evo 9 SWB demo car.