UK customers - please note this silencer is not road legal in the UK and will be marked Not for Road Use Motorcycle Downpipes Manifold Fits: Hyosung GT250R, GT250 COMET GTR250 (All Models) - Our headers are a featherweight 1.8 kg, less than half the weight of the standard OEM pipes at 4.05 kg. - Direct replacement for the original downpipes / collector. - Accepts the original silencer or any that fits the original system. - Removable silencer mounting flange, Fit your original Hyosung silencer to the 4 bolt flange, or simply remove it to install a Black Widow silencer / muffler. Also accepts any 51.5 mm slip on silencer. - Accepts the original Lambda (O2) sensor. - See kit photo for what's included. - Header Pipe Material : 304 Grade Stainless Steel. -.