Honda 400ex Exhaust - Honda ATV Forum
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post #1 of 15 (permalink) Old 12-03-2011, 08:36 PM Thread Starter
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Honda 400ex Exhaust

Hello i have a 2001 honda 400ex all stock and want to get a better exhaust. Something that is really loud. My friends told me big gun or hmf would be good which one is the loudest of the 2. And they will be a slip on.
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post #2 of 15 (permalink) Old 12-03-2011, 09:54 PM
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my buddie has a curtis sparks and it sounds nice and looks good its loud but he also has the full system. if they dont make slip ons then i would get an hmf.

  • 2007 400EX BLACK
  • UNI

2002 honda 300ex
Worked on it a lot but will be missed SOLD BUT WILL BE MISSED
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post #3 of 15 (permalink) Old 12-03-2011, 10:01 PM
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Welcome to the forums.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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post #4 of 15 (permalink) Old 12-03-2011, 10:57 PM
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hey I have an LRD pipe sounds real nice looks great and great power

92 honda 250x
99 honda 400ex
400ex upgrades
440 big bore kit
11:1 compression piston
stage 3 hot cam
04 450r carb
P&P head
LRD full system pipe
EHS racing outerwear filter for air box
Kn air filter
4" spal fan
nerf bars
ac front bumper
tech 4 tires
itp rims all the way around
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post #5 of 15 (permalink) Old 12-04-2011, 05:29 AM
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DMC Alien extremely loud. lol

96 Polaris 400L sport (Mrs. Moose Ride)
07 Suzuki LTZ250 (Sons)
96 Polaris 250 Trail Blazer (daughters)
06 TRX450ER aka === Under construction

Progress and Help
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post #6 of 15 (permalink) Old 12-04-2011, 01:05 PM
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FMF Power core

1999 Honda 400ex FMF slip on, Wrapped headers, Uni, jetted, tusk nerf bars, tusk front bumper, parking brake delete, tusk hid lights,
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post #7 of 15 (permalink) Old 12-05-2011, 07:57 PM Thread Starter
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I looked at all these and thought that the Big Guns EVO R will be good i hope it is because thats what i just ordered. And i hope it will be loud and powerfull because its indiana FTW!
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post #8 of 15 (permalink) Old 12-05-2011, 08:53 PM
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I just bought my curtis sparks exhaust today. if you want i will take pics if you want. I would get curtis sparks cause every place I read it says they are the best for the 400ex. I personally think they are sick as hell looking lol

Also I got a dyno jet kit with my purchase that way I can have it running good with the new exhaust.

2002 400ex with,
450r front shocks
AC nerfs forsale: 400ex shocks
Fly handle bars fly cr bars/grips
maxxis razr rear tires stock full exhaust
Curtis Sparks exhaust
Wiesco 11:1
Dyno Jet with 42 pilot jet
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post #9 of 15 (permalink) Old 12-06-2011, 12:55 AM
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I woulda got a looney tuned exhaust.there dual kit for the 400ex sounds wicked.


1991 Trx250X Custom exhaust,K&N jetted,widened 7.5 inches in the back and 8 inches in the frontWarrior rear shock and z400 front shocks with custom brackets.Race cut fenders.+3 swingarm.Way more to come.
Building things makes me happy.
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post #10 of 15 (permalink) Old 12-06-2011, 07:03 AM
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I have hmf and its really loud!! I also had a cobra exhaust on my one 400ex and that was the loudest pipe ive ever heard!! fmf is quiet don't get that! c sparks r loud but hmf has them beat! If your looking for the loudest I would have to say the cobra rev megaphone super loud!!!

2002 426ex 11:1 hi comp. wiseco,hot rods crank,stage 2 hotcam,rev max cdi box,ported intake & exhaust,header welds ground down,uni filter,lexx slip on,pro armor tether swtch, ,tusk nerfs,msr quick adj. lever, moose hand guards,moose bar hold down,renthal bars,xrf rear grab bar,moose bar hold down,rock front bumper,DG front frame guard,pep steering stab,alba alum gas cap,covers,HB racing rear brake block off,gripper seat cover,shock covers,custom 426 graphics,,,air scoops,tusk alum. shifter, is offline  

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