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Description
GPR Exhaust System Honda CB400 2017-2020, M3 Poppy , Slip-on Exhaust Including Link Pipe and Removable DB KillerProduction Time: 7 10 DAYS Weight: 1. 58 Lbs. 3. 48 Kg. Length: 13. 78 in. 350 mm. GPR's M3 Poppy Impact Zero was developed after the victories in the Moto3 World Championship. It has a removable racing grill and is road legal. It has been developed with a production process that produces zero impact to the environment. It has a stainless steel body, CNC machined bottoms with a carbon look finish. Its round shape has a diameter of 3. 9 inches (100MM).
Production Time: 7 - 10 DAYS
Weight: 1.58 Lbs. / 3.48 Kg.
Length: 13.78 in. / 350 mm.
GPR's M3 Poppy Impact Zero was developed after the victories in the Moto3 World Championship. It has a removable racing grill and is road-legal. It has been developed with a production process that produces zero impact to the environment. It has a stainless steel body, CNC-machined bottoms with a carbon look finish. Its round shape has a diameter of 3.9 inches (100MM).
FEATURES
• SOUND: Upgraded sound from stock exhaust.
• PERFORMANCE: Upgraded performance from stock exhaust
• QUALITY: Italian made with high-grade welding
• WEIGHT: Lighter than stock exhaust
Assembly: This kit includes the specific link pipe, with relative flanges, bushings, brackets and any screws. This allows for installation without any structural changes. The installation also involves the elimination of the catalyst and for this reason it may not be suitable for official vehicle maintenance.
ATTENTION: this article is homologated / approved for noise only, it is sold without catalyst but including the removable db killer, the customer must check in advance whether the presence of the catalyst is necessary in his country to comply with the regulations for circulation on the road network and to arry out the annual inspection. Tampering with the DB Killer and catalyst welding or antitampering screws or fastener is illegal for road use within the EU directives. It is permitted only for RACING use in the circuits. The use of the open version (without the DB Killer) on roads may does not comply with regulations governing circulation on the public road network.
This is an original GPR product, developed after GPR's experience in the World Championship. It offers an innovative design, improved performance, weight savings and a full-bodied sound.
GPR products are plug-and-play. However, GPR recommends the installation from a licensed mechanic as GPR will not accept any claims from a do-it-yourself installation. The use of racing items may require the remapping of the ECU, especially when there are additional modifications, such as the installation of a sports filter.
Made in Italy with a 2-year international warranty.
The included DB Killers are removable for racing use only. This exhaust may not road-legal and may does not meet local government regulations if DB Killers are removed.
If you buy online from a seller that is NOT GPR, we recommend you buy from a seller in YOUR COUNTRY to ensure that the item arrives with the correct approvals that must also comply with local legislation. Make sure before purchasing that the seller is trustworthy and offers the items that comply your road network.
The specific homologation certificate is provided, as well as the assembly instructions, each silencer bears the homologation code. In the event of problems encountered during the installation, it is mandatory to stop and suspend the activity, to immediately request information and / or advice from the customer care via email [email protected]
Reference: E4.H.255.M3.PP
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.8 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 5
Can't go wrong with Acorn for as long as they last!
Size: 12-13 Women/10.5-11.5 Men, Color: Charcoal
Acorn is just a great company all around. I had bought my husband these slippers over 20 years ago. They are still in great shape although the sole has worn in some places. But nothing's coming apart! However, I decided to replace them for him. His foot is 10.5 and they are a little hard to get on right away-of course, after over 20 years of having "worn in" the original pair, anything would feel tight. So I'm not holding this against them. They will relax with use. The only difference is that the original sole was black and these are tan. I think I would prefer the black, but since it's only being worn in the house, no big deal.
My husband has really cold feet and these slippers never fail to warm his feet right up! He said they feel really soft to walk in and like the cushioning. They're not too heavy and fit him great! I have Acorn slippers myself that I've worn every single day in the house and outside to the mailbox too. They last.
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Reviewed in the United States on April 11, 2026
★★★★★ 4
Very warm.
Size: 13.5-14.5 Women/12-13 Men, Color: Navy Blue
Very warm and comfortable. A little difficult to put on with the collared top.
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Reviewed in the United States on January 19, 2026
★★★★★ 5
You won't be sorry
Size: 10.5-11.5 Women/9-10 Men, Color: Black
Great padding for comfort and terrific warmth. I bought a pair of Acorns 30 years ago and still have them. Updated to a new color and now feel the benefit of newer padding! I used the sizing listed for shoes and like the roominess for thicker sox. Well made and a joy to put on. (Wisconsin)
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Reviewed in the United States on December 25, 2025
★★★★★ 5
Great Slippers
Size: 12-13 Women/10.5-11.5 Men, Color: Charcoal
Comfy, great price, looks great, fits well, size aligned, great quality. Love these slippers.
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Reviewed in the United States on February 16, 2026
★★★★★ 5
Extremely comfortable, leather sole. Hard to find a style.
Size: 13.5-14.5 Women/12-13 Men, Color: Navy Blue, Size: 13.5-14.5 Women/12-13 Men, Color: Navy Blue
Totally worth the price. This type of style is very hard to find, my husband had another pair a few years ago that he was never able to replace. These fit his wide feet and are very comfortable. The elastic at the ankle is not too tight. So glad I was able to find him a replacement. We bought the blue in a size 12. Love the fact that they are washable.
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Reviewed in the United States on February 12, 2026