Pro Circuit - 304 Factory Sound Silencer (Yamaha)
SKU: 6580926174

Pro Circuit - 304 Factory Sound Silencer (Yamaha)

$120.15 $133.50
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

Pro Circuit - 304 Factory Sound Silencer (Yamaha)Pro Circuit 304 Factory Sound Silencer (Yamaha) The Pro Circuit 304 Factory Sound Silencer is built for riders who want clean top end power with a smoother, quieter tone. Designed for Yamaha two strokes, the 304 uses a slightly longer canister to boost over rev and broaden the powerband while keeping noise levels in check. Its a favorite for riders who want factory level performance that looks sharp, sounds crisp, and lasts season after season.

Pro Circuit – 304 Factory Sound Silencer (Yamaha)

The Pro Circuit 304 Factory Sound Silencer is built for riders who want clean top-end power with a smoother, quieter tone. Designed for Yamaha two-strokes, the 304 uses a slightly longer canister to boost over-rev and broaden the powerband while keeping noise levels in check. It’s a favorite for riders who want factory-level performance that looks sharp, sounds crisp, and lasts season after season.

Crafted with a 6061 T6 brushed aluminum body and stainless steel inlet tube and end cap, this silencer is built for strength, light weight, and that signature Pro Circuit style. The double-walled mounting bracket keeps it rock solid through hard rides, and the allen-head screws make repacking quick and easy. Each silencer is TIG and MIG welded by hand in the USA, guaranteeing quality, precision, and durability that stand up to real-world abuse.

Why We Like It:
 It smooths out the power while keeping that lively two-stroke feel. You get a cleaner pull through the mid and top end, less bark off the pipe, and a high-end look that matches its performance. It’s the perfect “everywhere” silencer — track, trail, or race weekend.

Why It’ll Work for You:
 The longer body design helps your Yamaha run smoother and quieter without losing power. You’ll get strong top-end performance, easier throttle control, and less fatigue from harsh sound levels. It’s simple to maintain, fits perfectly, and gives your bike that factory-fresh finish that lasts.

Variants / Options:
 Fits most Yamaha two-stroke models. Works with stock or Pro Circuit pipes.

 

Key Features:

  • Longer canister reduces sound and smooths power delivery

  • 6061 T6 brushed aluminum silencer body for light weight and strength

  • Stainless steel inlet tube and end cap for durability

  • Double-walled mounting bracket for a secure fit

  • Allen-head screws for quick, easy repacking

  • TIG and MIG welded by hand in the USA

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 6580926174

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4.2 ★★★★★
Based on 226 reviews
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Verified Purchase
Layton Phillips
New York, US
★★★★★ 5
Great pillow, but the cooling effect depends on the cover
Color: Blue-ice Plus, Size: King(Pack of 2)
I really like this pillow overall. It’s comfortable, supportive, and feels well made. When you use it without a pillowcase, it definitely feels cool to the touch and does what it claims in terms of that initial cooling sensation. However, once you put a pillowcase on it, you can’t really feel the cooling effect anymore. I’ve tried multiple different pillowcases made from different materials, and none of them really let that cool feeling come through. That said, I still love the pillow itself. It’s comfortable and supportive enough that I’m keeping it. Just keep in mind that the cooling feature works best without a cover, which isn’t ideal for everyone. Overall, a good pillow — just manage expectations about the cooling effect once it’s covered.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026
H
Verified Purchase
Hannah N. Ford
Battle Creek, US
★★★★★ 5
Cooling and holds shape.
Color: Blue-ice Plus, Size: Queen(Pack of 2), Color: Blue-ice Plus, Size: Queen(Pack of 2)
Very nice pillow for the price is also holding up well and holding shape very cool and comfortable to the touch. Best pillow I found in a long time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
S
Verified Purchase
smmt
Massapequa, US
★★★★★ 5
Best Pillow Ever
Color: Blue-ice Plus, Size: Queen(Pack of 2)
Best pillow ever. Although it still gets "hot", it does take longer to get "hot". I love this pillow. I was buying a new pillow almost every 3 months. Other pillows would either remain rock hard or go flat. I was concerned at first when reading the description as I though the memory foam would be big pieces. They are soft fluffy pieces. I had to remove almost half of the foam to get the pillow to what works for me. I have not had to put any filler back in. Maybe in a couple of more months I may have to put a bit more in, but it is holding it's shape and not going flat. I do fluff it every night. This helps. I am a stomach sleeper. I have bought the expensive purple pillow and hated it so much I gave it to my daughter. This QUTOOL Pillow is the best! I bought a 2 pack. Have not used the other pillow yet, but I feel I may actually go years for once without having to buy a pillow as I have the 2nd one set aside if the first one gets to a point in need replacement. I have bought Dollar Store pillows. I have bought $300 pillows. None of them even come close to this pillow and the way you can adjust this pillow for you. The pillows came in a white mesh like bag. I keep all the unused "stuffing" in this bag. I have it hanging in my closet and I just fluff the bag once a month to keep the filling fresh so it is ready if and when I need it. Coming from someone who has trouble staying asleep, neck issues, a stomach sleeper who hate those flat pillows manufacturers think stomach sleepers like but actually hate, buy this pillow. Just buy it. Best Pillow for a picky person like me. Buy 2 or more so if you have to stay at a hotel, you can take your own pillow.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 15, 2025
J
Verified Purchase
Jedata
Waukegan, US
★★★★★ 4
Slippery Pillow
Color: Blue-ice Plus, Size: Queen(Pack of 2)
Nice and cooling but it’s so slick my pillow sheet doesn’t want to stay on.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
J
Verified Purchase
Jute
Draper, US
★★★★★ 5
Foam Mattress NEEDs Foam Pillows
Color: Blue-ice Plus, Size: King(Pack of 2), Color: Blue-ice Plus, Size: King(Pack of 2)
10 stars!! Quality foam, structure & price. Best bang for my buck.    HRV, readiness & total sleep score metrics increased drastically this week.  See screenshot :) Support: Molds and cushions every crevice under my neck and above shoulders. So comfy  Size: Adjustable loft but king length is perfect to hug and rest your head.  Love love love. The 1st 2 nights were uncomfortable with pillow as is, first night I was up at 3am half asleep pulling foam out but wasn't enough. The second night at 2am I pulled out more stuffing. I was getting frustrated..  my Oura ring showed both nights I was awake every hour.  Not good.  Before the 3rd night I pulled enough to fill the bag the 2 pillows arrived in. Boom -8hrs sleep and for the first time ii years I achieved 17% Deep sleep.  Huge. Weight: Perfect weight with adjustment. Squishy and molds to b the contour of my neck and shoulders Softness: Like the baby bear.. just right.   Comfort: Very comfortable after removing 30% foam in both pillows. I actually now have enough to make a 3rd pillow, replace old foam, or adjust OGs, Still to early to measure.  If you have a foam mattress that contours your body but not your head you'll end up with neck and/or back pain from head being elevated- not sinking/molding the body into a foam mattress. 
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 1, 2025

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