Best aftermarket exaust? - Page 3 - Honda ATV Forum
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post #21 of 29 (permalink) Old 07-11-2013, 01:48 PM
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The "best" exhaust completely depends on what machine we are talking about. For the 400ex, the absolute best full system exhaust is the sparks. For the trx450r there are several top names, but FMF unfortunately is a terrible pipe for the trx450. hmf, sparks, dasa, rossier, are all top pipes for the trx450r. As for slip ons, you're not going to see huge power increase so there are generally very little power differences between slip on pipes.
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post #22 of 29 (permalink) Old 07-12-2013, 09:16 AM
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My vote goes for HMF Competition series. Combines performance, looks, and sound adjustability with the 3 inserts which is huge in my opinion.
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post #23 of 29 (permalink) Old 07-12-2013, 11:08 AM
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Anyone use DG? I have it on my 300ex and I like it...
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post #24 of 29 (permalink) Old 07-13-2013, 07:54 PM
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Didn't mean to shut the thread down...
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post #25 of 29 (permalink) Old 07-13-2013, 08:56 PM
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Thread Killer ^^^^^ lol

2004 HONDA 400EX Red


* Namura 11:1 High Comp Piston (stock bore)
* OEM Honda CRF450 Timing Chain
* ProGrip Hand Guards
* Lexx MXe slip on
* K&N Air Filter with Outerwears
* No air box lid
* Jetted
* -1 Front Sprocket (14 tooth)
* D.I.D X Ring chain
* Dual Row Carrier
* Pro Armor Nerf Bars with Heel Guards
* Pro Armor Foot Peg Maximizers
* Pro Taper Bars
* All 4 CST Ambush Tires


Forgive me lord, for I have sinned. I hit a 3rd gear jump 4th gear pinned.
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post #26 of 29 (permalink) Old 07-14-2013, 07:45 AM
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Quote:
Originally Posted by Mudder_Trucker View Post
Thread Killer ^^^^^ lol
Lmao^^^^^^^^ I personally run FMF but for a 450r DASA. . . 400 Sparks, lexx, HMF

DG is short for Don't Get. Seriously. . Their bullet series is ok. . The megaphone series is total crap

"MOOSE WAGON "
00 TRX400EX aka "MOOSE ROCKET"
91 TRX250X aka "MOOSE WAGON" RETIRED
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
PM FOR MANUAL HELP
JETTING
Service_Manual_Downloads
2000_400EX_Build
400EX_Pivot_Bolt_
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post #27 of 29 (permalink) Old 07-14-2013, 09:38 PM
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LTE dual exhaust sound pretty sweet. They are expensive though with the relocated airbox it makes a clean appearence
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post #28 of 29 (permalink) Old 02-09-2014, 08:47 PM
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400ex sparks racing best exhaust by far

2008 400ex (will give 450's a run for their money!!)

87mm (416cc) wiseco forged piston 10:1
stage 1 hotcam
no lid
k&n filter w/ outerwear
stock carb: 178 main, 45 pilot, fuel screw 3 turns out
removed choke plate
moderate porting
curtis sparks x6 big core exhaust
gt thunder cdi
electric cooling fan
parking brake block off
15/37 gearing
front and rear wheel spacers
18in. holeshots
trx450r shocks

1989 350 foreman-26in ams swamp fox w/ moose rims

1986 atc 200x- mint
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post #29 of 29 (permalink) Old 11-30-2014, 12:17 AM
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I like my supertrapp pretty well on a 400ex
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