You can make your own ht leads for a cheap price in all sorts of colours. Grab some spare ones from a scrappy and copper cored wire from eBay. Try and get a Frankspeed manifold as they look standard and flow well too. Plus much cheaper. Induction kit is unlikely to do much. If it sound you want then just take off the resonator pipe (one with a funny blanked off extension to air box intske) free and sounds good. Have you done the rev limiter removal mod?