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Old 02-01-2011, 08:49 PM   #1 (permalink)
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2002 300ex exhaust

i have a bone stock 300ex and i want to do a slip on exhaust, but i dont have any idea where to start as far as a brand or if i need to rejet.if i must rejet what about a full kit?any input will be great thank you.
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Old 02-02-2011, 12:08 PM   #2 (permalink)
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well there are alot of good slip on exhaust like HMF, sparks, white brothers e series, and fmf. i wouldnt go with fmf cause i just dont like it. HMF is by far my favorite if you like lowed and screaming but if you get sparks it has a low sound at idle and at full throttle it kinda sounds like the fmf q4. if you get a airfilter get uni or k&n. on the k&n you have to make sure its good and oiled and has a outer wear around it cause if your running in sand its easy to get that dirt through it, on the uni its a foam filter veary thick and comes with oil on it but if you get it oil it up more just to make sure. you will have to jet prolly i have never jeted my bikes and people say you have to or your engine with run hot so im geting dyno jets soon so i hope this help
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99 400ex
mods:
k&n airfilter
HMF slip on exhaust
itp front tires
razr rear tires
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Old 02-02-2011, 01:41 PM   #3 (permalink)
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i had a fmf megamax2 on my 300 and i loved it it sounded great just dont go with a dg youll regret it and yes u will have to rejet even with a slipon
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Old 02-02-2011, 02:25 PM   #4 (permalink)
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if you do get exhaust get hmf, or sparks really just do it alot of power gain and youll love it
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99 400ex
mods:
k&n airfilter
HMF slip on exhaust
itp front tires
razr rear tires
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Old 02-02-2011, 10:47 PM   #5 (permalink)
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thanks for all the input guys. one of my buddies told me to with yoshimura. any thoughts?
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Old 02-06-2011, 01:57 PM   #6 (permalink)
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If your willing to pay the price for a yoshi. U might give Looney Tuned Exhaust a call. They built a full exhaust for our 300ex build and it produced 2 more HP then the hmf did. But I don't know if they make them for the 300ex. They might. The only downfall with a Looney exhaust it's VERY loud. But I love it I can ALWAYS tell when he is coming in a whole pack of quads. NO other exhaust has a sound like this exhaust.
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Old 02-28-2011, 04:49 PM   #7 (permalink)
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How many here have the same catback? I run the flowmaster





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gibson exhaust
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