Pro Circuit Factory Sound 304 Silencer

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Pro Circuit Factory Sound 304 Silencer
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Pro Circuit Factory Sound 304 Silencer

Our Price: $100.88$121.95

MSRP: $134.95 - You save up to $34.07 (25% off)

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Details

    The Pro Circuit Factory Sound 304 Silencer is designed for most types of riding and for riders that want a silencer similar to the R-304 but with a little less noise output, and little more of the power near the top end of the rpms.

    That power of the 304 comes from a straight-through design of the stainless steel stinger, end cap, and aluminum canister body, leaving exhaust gases free to leave as efficiently as possible. But because the Factory Sound 304 has a slightly longer canister body than the R-304, sound is reduced as the E-Glass packing material has more time to absorb some of the exiting sound waves. The length also slightly affects the power band by giving your bike a little more top end.

    But even with the longer body, the premium materials used still result in a weight that’s much less than your bike’s stock silencer. Plus you get removable hex head hardware so you don’t have to drill out any rivets when repacking. All of it adds up to make the 304 Silencer an excellent option if you want maximum performance with a sound that won’t get you kicked off a track or trail.

    Specs:
  • Adds additional power in the upper rpm range
  • Extended canister body reduces noise output
  • Lightweight construction weighs less than stock
  • Deep works-like exhaust note
  • Unrestricted exhaust flow
  • Easy to repack using hex head removable hardware
  • Stainless steel stinger/intake pipe
  • Stainless steel end cap
  • 6061 T-6 aluminum alloy canister body
  • Packed with E-Glass material for maximum packing life
  • Double-walled mounting bracket(s)
  • Tig and mig welded construction
  • Attractive brushed finish
  • Made in the USA

Pro Circuit Factory Sound 304 Silencer Reviews

Each review submitted enters you into a
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
 
4.8 / 5.0
20 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
18
1
0
0
1
Value
4.4 / 5
Durability
4.8 / 5
Ease of Installation
4.2 / 5
Fitment
4.2 / 5
Performance
4.8 / 5
Finish
4.8 / 5
Features
4.8 / 5
Recommend it?
Yes (3)
No (1)
Value
5 / 5
Durability
4 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
4 / 5
Finish
4 / 5
Features
4 / 5
Great look
Easy install. No difference in sound.

-m-2007 YAMAHA YZ250--
November 2, 2017
Massapequa, NY, US
Age: 25-44
Purchased
4 months ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Really smoothed out power
I was expecting a strong boost in top end. Instead I got a much more desired smoother boost throughout from bottom to top. Now I can ride my KTM 250sx with lots more confidence. Really easy install; everything fit perfectly. I'm glad I did it. I also have a Steahly 11oz weight, so that might be part of the reason for the smoother power characteristic, although with the OEM pipe and the Steahly weight, the bike tended to have the typical 2t power hit that would throw me off on jumps. Now it's near silky smooth - very nice!!

-m-2015 KTM 250 SX--
March 27, 2017
Solvang, CA, US
Age: 45-64
Purchased
1 year ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Nice silencer
Excellent fit, excellent performance, and a nice sound.

-m-2007 YAMAHA YZ250--
March 5, 2017
Selkirk , NY, US
Age: 25-44
Purchased
1 year ago
Gender:
Male
Weight:
131 - 160 lbs.
Height:
5'4 - 5'6
Value
2 / 5
Durability
5 / 5
Ease of Installation
1 / 5
Fitment
1 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
No
Great looking & weight loss ...but
Sad to say, but had major misalignment issues using stock expansion chamber . I installed many different brands on my machines over 35 years & by far this combo on my 17 ktm was the worst for installation.Did all the secrets ,IE loosen all pipe mounts ,subframe bolts, etc. Still had to grind out mounts on silencer.Silencer mounts should be a little taller & welded further down silencer body towards the pipe .When the slip fit bottomed out(joint between pipe & silencer) the silencer mounting holes were off by a few millimeters & this is with me pushing and flexing the entire loosened exhaust system.I had to grind the silencer mounting holes & washers egg shaped to get it to mount.I am going to remove system completely & grind off about 1 1/2 MM off my stock pipe slip fit joint as I feel there is too much pressure & may lead to stress cracks.Great weight savings & better bottom end response.My pipe is in mint condition (not bent). I wish I bought the FMF silencer as it fit my other bike 12 ktm perfectly & with enduro engineering pipe combo.

-m-2017 KTM 250 SX--
December 12, 2016
windsor locks, CT, US
Age: 45-64
Purchased
1 year ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Mint
Wanted to get that extra power and clean sexy look for my bike so purchased this here pro circuit. Y'all won't be disappointed, gives your bike that clean 2 stroke sound with a lil more noticeable power for cheap price if ya don't wanna spend 10 million on some fancy pipe
October 17, 2016
St.thomas , ON, CA
Age: 15-24
Purchased
1 year ago
Gender:
Male
Weight:
101 - 130 lbs.
Height:
5'7 - 5'9
Good product
Perfect, works as advertised.
February 16, 2016
Post Falls, ID, US
Age: 25-44
Gender:
Male
Weight:
131 - 160 lbs.
Height:
6'1 - 6'3
Pro Circuit rules on a KX
Great quality, great sound

Machine this part was bought for: 2003 KAWASAKI KX100
September 1, 2015
ID
Well worth it
First off I love ordering from Rocky Mountain MC. I ordered the pipe Friday night and it was on my door step Saturday morning, standard shipping is always lightning quick as I live in idaho and they always ship products immediately. As for the pipe, I bought it to replace my pro circuit forest service approved pipe. All in all it's 1000 times better. It's still pretty quite, I believe it has a spark arrestor as well, has a deep throaty sound that is music to any two stroke lovers ears, and best of all it wakes up the power band a bit. The pro circuit platinum 2 pipe with this silencer is a deadly combination that I'll use for a long time.

Machine this part was bought for: 2002 YAMAHA YZ250
April 12, 2015
ID
For Motocross Use
In my 25+ years riding 2 strokes, Pro Circuit 304 silencers are better than an aftermarket pipe. The longer 304 allows the power to rev out longer which is better for outdoor, faster motocross use. As long as your bike is jetted correctly for the stock pipe, there are no changes needed for the 304. True, effective, and simple bolt on power.

Machine this part was bought for: 2013 KTM 250 SX
February 24, 2015
GA
Great silencer
Great silencer. Pro Circuit seem to be a perfect match to Honda. Will not buy another brand. Three of my dirt scooters have them, and love the finish and sound.

Machine this part was bought for: 2004 HONDA CR250R
January 27, 2015
NC
Each question or answer submitted enters you into a:
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 2 questions Browse 2 questions and 8 answers
Will we need to re-jet our carb if we put on a Pro Circuit silencer?
John M on Jul 24, 2017
BEST ANSWER: yes up one size on main jet for just the silencer and stock exspansion chamber but if you have an aftermarket exspansion chamber and silencer go up 2 sizes on the main jet and up one on the slow idle jet and then adjust your air intake screw for peak performance
Wondering the cost of pro circuit pipe and silencer for a 98 yz 250?
Eddy N on Feb 15, 2018
BEST ANSWER: Unfortunately, this silencer is not listed to fit your machine. I'm sorry for the inconvenience.
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