Will it fit 2017 kx250f

Should be no issue if you have a 1.5-2" inlet. I put on my 1983 honda 250 big red. It was really easy and looks nice.

Where do the springs attach to hold the muffler if your stock header uses a screw clamp to attach the factory muffler?

I'm not sure. I used it on my SxS. I cut the old muffler off and just used a muffler sealing compound and a muffler clamp. It is a straight through design and it is loud. I wouldn't use it on anything for the street cause it is likely to just get you pulled over and if you need an inspection sticker it will not pass.

What is the pipe size in the muffler and at the exit?

2" all the way through. Comes with downsize adapter to 1.5" for the inlet

Will this fit an 08 kx250f with an FMF mid-pipe and header pipe?

Yes, you will need to buy an adapter but they are cheap at any parts store.

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Universal 1.5-2" Inlet Hexagon Exhaust Muffler Pipe Slip On Scooter Motorcycle ATV Dirt Street Bike

Universal 1.5-2" Inlet Hexagon Exhaust Muffler Pipe Slip On Scooter Motorcycle ATV Dirt Street Bike

Product ID: 62332452

Details

Brand
Fast Pro
Item Weight
3.3 pounds
Material
Aluminum Steel
Shape
Hexagonal
Vehicle Service Type
Atv Bike Dirt

📏390mm length - perfect fit

🔩38-51mm universal inlet diameter

⚙️Hexagonal design for sleek style

₨2501

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Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Turn heads and drop jaws with every rev!

SLEEK HEXAGONAL DESIGN - Stand out with a modern, geometric muffler shape that complements your bike’s aggressive look.
AGGRESSIVE SOUND PROFILE - Delivers a loud, throaty roar that commands attention and boosts your ride’s presence.
UNIVERSAL FIT ZERO HASSLE - Fits any bike or ATV pipe diameter from 1.5" to 2" for seamless upgrades.
DURABLE TRIPLE MATERIAL BUILD - Crafted from aluminum, stainless steel, and titanium for lightweight strength and corrosion resistance.
PERFORMANCE BOOST ON A BUDGET - Enhances throttle response and engine tone without breaking the bank—ride louder, ride prouder.

The Fast Pro Universal Hexagon Exhaust Muffler is a 390mm slip-on designed to fit 38-51mm pipes, compatible with scooters, dirt bikes, ATVs, and street motorcycles. Made from a durable blend of aluminum, stainless steel, and titanium, it offers a loud, aggressive sound profile that enhances performance and style. Its universal fit and bold hexagonal shape make it a top choice for riders seeking a budget-friendly upgrade that delivers both attitude and function.

Specifications

ASIN	B07B29T6FG
Best Sellers Rank	#27,441 in Automotive ( See Top 100 in Automotive ) #6 in Powersports Silencers & Mufflers
Brand	Fast Pro
Brand Name	Fast Pro
Compatible with Vehicle Type	Atv,Bike,Dirt,Dirt Bike,Motorcycle,Scooter
Customer Reviews	4.4 out of 5 stars 741 Reviews
Inlet Connection Size	1.5 inches
Item Weight	3.3 pounds
Manufacturer Part Number	F17130008
Material	Aluminum, Stainless Steel, Titanium
Material Type	Aluminum, Stainless Steel, Titanium
Model Number	F17130008
Shape	Hexagonal
UPC	721352557980
Vehicle Service Type	Atv,Bike,Dirt,Dirt Bike,Motorcycle,Scooter

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