Sorry for the essay XD
Depends if u want 'power' or just the noise, if u want noise then definatly worth it, love mine as it roars XD.
Power wise u can see a very minimal bhp differance either + or - from standard depending on heat soak and filter youd be using. Wether its just a foam or paper or an inclosed uprated kit it will all make a differance on gains or losses, my filter gets loads of heat soak and the induction pipe is quite warm after a good run so id be losing power from that setup, so needs wraping and a heatsheild to help but thats extra cost for little gains.
My filter is a pipercross universal foam filter and was £40ish and the samco hose is normally £80ish but got it from another CS user for £20 and the alloy bend was £20.
Needless to say i didnt set my induction kit up for power just for noise and look in the bay
