ok im getting a 450r soon (if not today) and was wondering which is the best slip on pipe for it and which is the best full system? also do u think i should get the full system or is the stock head pipe fine? thanks

 

I have a WB E series on mine. I just ordered the pipe so I'll have a full system now. Pretty happy with the slip on. I'll post any gains I "get" with the headpipe change...

 

the header adds more power than the actual pipe does. the stock header is small and very restrictive, an after market header is bigger even though it may not look much bigger. i wouldnt even bother getting a different pipe if i wasnt going to get a header too.

 

I have a HMF slip on, it did give a noticable gain all around. Sounds pretty good too.

 

I would like information on this too. So far the best full system pipe I've seen is the Rossier Engineering pipe. HUGE head pipe and I guess It's not too loud with the spark arrestor in. I would like to check one out if I get some extra cash....

 

i got the complete HMF system. kinda loud but sounds really good to me. great power gain everywhere. i recommend it.