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5" big boost pipe kit makes it a must upgrade for your 400+BHP Focus RS (Rolling road recorded unofficial 733 bhp/650 lbft
push reservoir downwards and you can then remove brake res cap to top up the fluid on service intervals
Tuning and hard driving does take its toll on the Focus due to its already marginal cooling system
Developed and tested on Paul Hamling's 390BHP record breaking Focus RS
How easy is it to fit
BMC Focus RS MK2 Replacement filter Forge 5" big boost pipe kitThis is a direct replacement element which sits straight into your airbox. BMC air filters are designed and produced to ensure a higher air flow than original paper filters. In F1, for example, BMC cotton filters minimize the loss of air flow pressure passing through the air filter; this way ensures the best conditions for full exploitation of maximum power. Therefore the benefits of replacing the original paper filter with BMC cotton air filter,
