M4 GP Series Slip-On Exhaust - Black

looks great!!!!! sounds great !!!!! very easy to install but the instructions dont help you any.

Great sounding exhaust. I don't really notice any performance upgrade but its looks and sounds great. It's loud but not to loud. Breaks in after a few days and really opens up nicely.

Easy to install just like other slip ons. Added a little rumble and looks better then the big a** chrome stock slip on. If you dont have the cash to drop on a two brothers this is the way to go.

I bought this exhaust mostly for a better sounding exhaust. If you want performance and power you need a full exhaust. I like the gp look to it and it gives your bike a better look.

I have the M4 Slip-On connected to the M4 Mid-Pipe..Obviously you can go get a MUCH better slip-on out there that produces more power and torque..But if your not looking to get a Full Exhaust YET. I recomend not just getting the M4 Slip-On, cuz you will notice a very slight difference in sound and maybe a gain of 1HP..If you delete the cat with the M4 Mid-Pipe with it, you are saving about 12LBS, It sounds GREAT, and I gained 8HP on dyno and a TON of torque..But on a cool day with right conditions, you can gain up to 10HP!!!..Now with the Slip-On being $239 and the Mid-Pipe being $179..Your getting descent gains for $420..Not as much gains as you would with a full M4 exhaust..But about 75% of the gains a full system would give out BUT a full M4 system is $879-$900...And the Midpipe and Slip-On takes MINUTES to install, where a full system, you would maybe want to take to a mechanic to make sure everything is sealed 100%, but even if you did it yourself, your talking around 2 hours work.....LOL SO TO END MY RANT, IF YOUR LOOKING FOR DESCENT GAINS FOR LESS MONEY AND ALOT LESS AND EASIER LABOR, GET THE M4 SLIP-ON WITH THE M4 MIDPIPE!!!...ME PERSONALLY, I WOULDNT GET A SLIP-ON UNLESS YOU HAD A MID-PIPE, CUZ IF YOU DO THAT, YOUR JUST DOING IT FOR LOOKS, IT REALLY DOES HARDLY ANYTHING ASFAR AS PERFORMANCE AND YOU HARDLY HEAR MUCH OF A CHANGE IN TONE.....

I bought this for my 2011 ZX-6R to replace the stock exhaust. Without a doubt a great investment; your motorcycle will have a much deeper and louder sound that others will respect. Looks great and feels solid.

I just finished installing it on my 2009 zx10r and let me just say that it sounds and looks amazing.My only downfall was that the instructions were very blan and not very informative but my real issue was that the bracket that holds the exhaust to the rearset does not fit at all.I had to use a zip tie until I can get something custom fabricated,

I have the cat box still on my bike while running this exhaust, and it still makes a noticeably louder and deeper tone which i love. As for durability i hit a cone while riding and it dented the outside of the can.

Love this exhaust, sounds great and was very easy to install.