To give our customers the best shopping experience, our website uses cookies.  Learn More

Pro Circuit R-304 Shorty Aluminum Silencer

Choose a machine

User Tip: If you're unsure of your vehicle type, you may skip the machine type selection box.

Use one of my Saved Machines
Pro Circuit R-304 Shorty Aluminum Silencer
  • View Larger
  • Video

Pro Circuit R-304 Shorty Aluminum Silencer

Our Price: $127.54

MSRP: $141.71 - You save up to $14.17 (10% off)

View Product Details

Select type, year, make and model above

Live Help
  • "Customer service is priority #1 at Rocky Mountain ATV/MC. We value our customers and strive to be the best shopping experience- when you buy from us, you are buying lifetime service."

    -Dan Thomas, CEO and Founder

  • Returns

    We take pride in offering no hassle returns. In the event of a return, please call, email or chat with us to receive a solution to the problem. For apparel that doesn't fit quite right, Click here to see our Fit Guaranteed Program.

  • Warranties

    We will stand behind all products we sell with regards to manufacturing defects in workmanship and material. Most products are limited to the manufacturer's warranty. However, we will do everything in our power to take care of the problem.

  • Have questions?

    Live Help (Leave email if after hours)
    Email: [email protected]
    Call us: 1 800 336-5437
    7am-7pm Mon-Fri 8am-4pm Sat (Mountain Time)

How to - 2 Stroke Silencer Install

Details

    The R-304 Shorty Silencer is Pro Circuit’s go-to option for riders that want maximum power, the best sound, and a compact size for their track-oriented 2 stroke dirt bikes.

    With the Shorty you’re looking at a stainless stinger, stainless end cap, and a lightweight aluminum canister body that’s cut short to give you both more low end punch, and less of a chance of crunching the silencer if you loop your bike.

    Construction is top notch like all Pro Circuit components, so expect a much lighter weight than stock and removable hardware so you can easily repack your silencer without drilling any rivets.

    Specs:
  • Short canister body for optimum power gains
  • Improves power in low to mid range
  • Lighter than stock silencer
  • For closed-course use only
  • Easy repacking/disassembly with removable hardware
  • 6061 T-6 aluminum alloy canister body
  • 304 Stainless steel intake tube
  • Stainless steel end cap
  • Double walled mounting bracket
  • Tig and mig welded
  • Brushed finish on canister
  • E-Glass packing for max material life
  • Made in the USA
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Pro Circuit R-304 Shorty Aluminum Silencer Reviews

Each review submitted enters you into a
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
 
Powered by TurnTo
4.8 / 5.0
34 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
31
2
0
0
1
Value
4.8 / 5
Durability
4.9 / 5
Ease of Installation
4.8 / 5
Fitment
4.7 / 5
Performance
4.9 / 5
Finish
4.9 / 5
Features
4.7 / 5
Recommend it?
Yes (28)
Value
5 / 5
Durability
5 / 5
Ease of Installation
3 / 5
Fitment
3 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Better Performance
Looking for better performance on a KTM 250 xcw. Wanted more bottom end and quicker power response. Found great results with this silencer. Like that it has two mounting holes for support with it being a shorty silencer. Sound is amazing also. The only gripe i had was fittment. I had to put slight more bend on the silencer to get the holes to line up.

-m-2018 KTM 250 XC-W (E-Start)--
October 3, 2019
Clayton , DE, US
Age: 25-44
Purchased
 8 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
6'1 - 6'3
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
Awesome
Forsure lighter and just the silencer made the bike faster. Well worth the money!!

-m-2019 YAMAHA YZ125--
July 28, 2019
Cornell , WI, US
Age: 45-64
Purchased
 4 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
Value
4 / 5
Durability
4 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
4 / 5
Finish
5 / 5
Features
3 / 5
Recommend it?
Yes
Awesome
Good fitment, good gains, sounds great

-m-2019 KTM 300 XC--
July 3, 2019
Tucson, AZ, US
Age: 25-44
Purchased
 5 months ago
Gender:
Male
Weight:
131 - 160 lbs.
Height:
5'7 - 5'9
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
Awesome deal, amazing sound
Love the pro circuit r304 shorty, great performance and sound for my YZ250. Also really easy to service. Thanks for the great deal Rocky Mountain, lowest prices you will find anywhere!
January 25, 2019
Martin , KY, US
Age: 25-44
Purchased
 1 year ago
Gender:
Male
Weight:
131 - 160 lbs.
Height:
5'10 - 6'0
Recommend it?
Yes
Great product
Bike sounds great with new exhaust definitely recommend
January 19, 2019
Plymouth, MA, US
Purchased
 10 months ago
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
Friggen thing barks dude!
Sounds amazing on my bike! I like the sound better than my friends FMF on his '18 KTM 300.
January 5, 2019
Gray, ME, US
Purchased
 1 year ago
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
More power light weight and sounds great.
-m-2018 KAWASAKI KX85-- using in racing. Does a great job.
December 15, 2018
Dunlap, TN, US
Age: 15-24
Purchased
 12 months ago
Gender:
Male
Weight:
<100 lbs.
Height:
<5'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
1 / 5
Recommend it?
Yes
Pro Circuit R-304 Shorty
Pro Circuit need anyone say more. This product was just what the KX-85 needed. All-around performance has improved, and the sound can’t be beat.
September 18, 2018
East Northport, NY, US
Purchased
 1 year ago
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
This pipe is Silencer is awesome
So I bought this because my son wanted it for his birthday so bad. We looked at this one and the FMF pipe but decided to go with this one. We made a great decision. Sounds and looks great with a great fit.

-m-2018 KAWASAKI KX65--
August 11, 2018
Point Pleasant, NJ, US
Age: 25-44
Purchased
 1 year ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'7 - 5'9
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
Looks great!
The overal construction of this pipe is very clean and the Wealds right on speck. Mounts right up with no hassle or bending required. Sounds good on the top end and should really give my bike the low end for the track. With the ufo restyled kit on a 14 yz250 sits inside the plastic and looks very clean and no jetting was required.

-m-2014 YAMAHA YZ250--
July 15, 2018
Chehalis , WA, US
Age: 15-24
Purchased
 1 year ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
6'4 - 6'6
Each question or answer submitted enters you into a:
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
Powered by TurnTo
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 6 questions Browse 6 questions and 15 answers
Will the 2017 ktm 250sx model fit the 2017 ktm 300xc?
Corey H on Dec 20, 2016
BEST ANSWER: The OEM silencers are the same for those two bikes so this pipe should also fit the 300XC.
Does this muffler come with Spark Arrestor?
Jorge C on Mar 29, 2017
BEST ANSWER: Jorge, the muffler that you are looking at does not come with a spark arrester. I have one on my dirt bike. It works well if you need more bottom end.
What is the length of the canister?
A shopper on Dec 30, 2018
BEST ANSWER: The one I have is for a rm85 its 7-1/2 " long
So i have a 2006 yamaha yz125, I only ride enduro/ desert, once in a blue moon motocross. would this be a good silencer and would it benift my type of riding? I have a fmf shorty but its just way to loud on those longer rides, and i also have a fmf turbinecore 2 but it seems to really cut out in the bottom end...
Dominick J on Sep 17, 2019
Pro Circuit R-304 Shorty Aluminum Silencer
Pro Circuit R-304 Shorty Aluminum Silencer
Pro Circuit Factory Sound 304 Silencer
Pro Circuit Factory Sound 304 Silencer
BEST ANSWER: I like mine, has tuns of low end, but I also have the pipe to go with it.
Does anyone know how long the kx85 silencer
is?
Chad M on Sep 19, 2017
BEST ANSWER: It's pretty short , "low profile" I have the Pro Circut R-304 silencer on a 2 2014 KX100's
Producer super good sound super durable and more responsive.
Does this silencer also fit the yz250X?
Frank P on Dec 6, 2016
BEST ANSWER: Yes, this should work for the 250X as well. The YZ250 and YZ250X use the same OEM exhaust.
RM Cash ProgramParts Finder