matty w said:You can see gains of 10bhp from a ported inlet manifold which will cost you less than £200
16v_jon said:you dont need to take the engine out at all just drop the subframe. i got my 182 manifold for £200 from a chap in france did all the work myself and just cut and welded the 172 exhaust to fit. and it dont gove 10bhp more like 5bhp so if you get some monkeys like k-tec to do it , its not really worth it as matty says the inlet work is better