Narrowed it down between these two pipes and planning on ordering one of them after I order brand new black Maier plastic. So which one will give me better performance gains? Low? Mid? Top? What are the pros and cons of each exhaust? Which one is louder?

 

hmf would be lourder and it looks better but i run a white bros. e series on my 400ex and i have to say go with the e series i love mine

 

Well if it were me I personally like the hmf for performance and looks. Yes it is on the loud side but imo and the location I ride at the sound makes no difference to me.

 

1 vote for each

 

Are you getting the full exhaust or the slip on? If you want the E Series slip on and want to save some money, I'll sell you mine. I bought it brand new and it is still in perfect shape. The Eseries has a great performance gain and I like it, but I'm getting a full exhaust because I'm working my way up to a worked motor. You can't see it in the pictures because the pictures are of the opposite side, but it is on the bike in my pics. Let me know, and I'll get you a close-up pic of just the pipe. PM or email me if so, Chevy181@aol.com

 

the hmf looks better.....but IMO the wb performs better..........I really dislike the performance of the hmf pipe........
but it all depends on what u are going to do with the bike.....

out of those 2 I would pic WB.........but I wouldn't recomend either unless u are worried aobut price....

 

The E-Series is a great pipe but I've had a couple probs with them over the years. The weld in the back brakes and the screws that hold the disks in strip out and brake really easily, you gotta be really careful with them. It's also a pain in the butt to repack them because you have to remove the rivits, open the case, and then rivit it back together! All in all I love the adjustable power on it (less disks more torque and more disks more top end) and the power in general is good. It could be a little more flashy but has a good clean look that doesn't dull easily.

I don't know much about the HMF systems cept they are loud and look pretty good. Anyone know more pros and cons of the HMF?