Anyone changed they're headers/downpipes for aftermarket ones?

[Fazer Jim]

II'm looking to change my original headers to a set of stainless ones from Sandy Bike Spares. Only £250. It means junking the Exup system entirely but I'm sure my bike Guru who skimmed the head and did a bit of porting will be able to do a bit of carb set up to help. Anyone used these headers or indeed any other headers? Decent results?

[Falcon 269]

Decent results?  Not on the dyno charts I've seen.  

No amount of tuning skill with carbs and intake tweaks will overcome a poorly designed header system. 

They're cheap for a reason - avoid.

[Fazer Jim]

  Pretty much my gut instinct aswell. The noise from my Exup valve (we all know the famous rattle) is driving me nuts. I might just have to invest in replacement parts. Hopefully I'll be able to disect it soon and fingers crossed some new bushes will do

[chaparral02]

I wouldn't get rid of the Exup valve on a gen1 as you most likely loose a lot of bottom/mid range power..

Plus the Exup valve on the gen1 makes an aftermarket exhaust silencer sound nice & quiet at low rpm...