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I want to buy a HP4 -13 link pipe. I guess its the same on all models. BMW or HP4, both goes. Please send PM or post a reply here. I live in Sweden but the cost from UK to SE is cheap. Thanks!

I have a HP4 with the cat still attached to the bike. I just did a run on a track and was reaching 97db redline in second gear. I searched online but cannot find any dyno readings etc with and without the cat. Maybe you guys can help? My bike is mapped and using a PCV with the cat installed...

Hello, Newcomer from Stockholm Sweden. Bought an HP4 -13 this winter. Recently I have owned a Triumph Speed triple -01, then -07. Sold the last one after riding 2 days at track. Bought a Suzuki K6 for track then sold the Speed Triple and bought a similar for road abuse. Used my K6 for 2...