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Description
GPR Exhaust System Piaggio Vespa Gts 250 I.E. 2005-2015, Evo4 Road, Full System Exhaust, Including Removable DB KillerProduction Time: 10 15 DAYS Weight: 2 Lbs. 4. 41 Kg. Length: 13. 78 in. 350 mm. GPR's Evo4Road series is made of 304 stainless steel with a ceramic paint finish that withstands high temperatures. It has an oval shape with a diameter of 100 MM x 130 MM. 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 GPR supplies a 304
Production Time: 10 - 15 DAYS
Weight: 2 Lbs. / 4.41 Kg.
Length: 13.78 in. / 350 mm.
GPR's Evo4Road series is made of 304 stainless steel with a ceramic paint finish that withstands high temperatures. It has an oval shape with a diameter of 100 MM x 130 MM.
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
GPR supplies a 304 stainless steel manifold. The package includes flanges, bushings, brackets. It mounts directly on the cylinders without any structural changes.
To install, no structural modifications are required. GPR recommends reading the included instructions or tutorial on http://www.gpr.it or the GPR channel on Youtube.
For on-line purchases, activate the warranty by sending the installation receipt from the mechanic / shop via email to [email protected], or sending the sales receipt from the physical or online store.
The exhaust has a removable db killer (noise restrictor) for racing use. Removing the DB Killer is ILLEGAL and the customer assumes the responsibility if they use the motorbike as on the circuits only, without bags, without flash lights, number plate holder or other parts that would conflict with the different angle of the gas following the transformation into the racing version. Abuse of this situation on the road will result in the loss of the product warranty and any refund request will be rejected.
The warranty is two years from the purchase, with right of reparation with a return to the GPR factory, or the nearest official distributor at the customer's expense.
GPR will not provide a new silencer, but will repair the original silencer. The customer must accept to remount the original exhaust or wait the standard time for the repair.
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.
Made in Italy with a 2-year international warranty.
Tampering with the DB Killer 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 does not comply with regulations governing circulation on the public road network.
This kit is homologated for noise only. Please check whether a catalyst is necessary within your country to be road-legal and to pass any local inspections.
GPR Products are plug-and-play. However, we do recommend a professional installation.
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.
Each package includes the homologation certificate, assembly instructions, and a homologation code on each silencer.
In case of a problem during installation, please stop the installation process and immediately contact customer care via email at [email protected]
Reference: SCOM.171.EVO4
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
4.2 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
Very nice funnel
Color: Black, Size: 58mm
58mm fits perfect on a Pullman basket. Good quality as well. Be careful the magnets are strong the benefit of this design though is, it is a tamp through. Keeps the mess to a minimum transferring from dosing cup to portafilter, keeps your grounds in the basket during distribution as well.
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Reviewed in the United States on June 7, 2026
★★★★★ 5
makes it easy to pour into and wdt your portafilter without making a mess
Color: Black, Size: 51mm
Did you know there are 2 different types of dosing funnels, one with a inner collar/lip and one with an outer one?
the normcore dosing funnel has an outer collar/lip, which means it secures to the outside of the portafilter basket, keeping it lined up. i didn't realize when i bought it, but the advantages to the outer lip is that there is no space or gap when the dosing funnel is removed (the inner lip takes up space along the edge of the basket, leaving a ring of space without coffee grounds). having the lip on the outside means, when you're done with your wdt, you don't have to do anything else besides tamp.
at first, i was getting grounds all over the place when i was tamping because the grounds would push out to the sides as i was pushing down. i realized that the tamp (normcore v4 tamper) fit perfectly in the dosing funnel, so before i removed the funnel, i would lightly tamp with the tamper, giving me a little more space to place the tamper without worrying about grounds going all over the place.
the magnets on this dosing funnel work pretty well, although, depending on your basket, it may work better than others. when magnetically attaching the funnel to different baskets, flipping the funnel upside down and shaking, holding the basket, the dosing funnel held pretty securely to the pressurized baskets that came w/ my delonghi, as well as the basket that came with my bottomless portafilter. the ims precision competition basket however, doesn't hold as securely.
i thought at first it was because the lip of the basket was too big, but it turns out it's the same size as everything else. it turns out that while most of the top of the basket is flat, the inner edge is raised, maybe to help keep grounds from coming out. that raised bump on the top of the basket, is taller than the other baskets, so the metal that is to come in contact with the magnet is further away compared to the other baskets. still, it holds it securely enough while using it normally, so i won't be doing any modifications to the ims basket.
the normcore also flares out at the top, making it wider. this helps with wdt-ing, allowing to work at more angles compared to the straight walled versions. it also makes pouring your grounds into the basket easier.
although a little more expensive compared to other dosing funnels, i am very satisfied with how it makes it easy to wdt and tamp without making a mess. there was a little learning curve/trial and error to find the best way to use it, but i figured it out on day 2.
would definitely consider buying another if i get a different machine with a different portafilter size
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Reviewed in the United States on July 21, 2024
★★★★★ 5
Good Upgrade over steel or plastic nice height
Color: Black, Size: 58mm
Pretty good quality. Not a perfectly aligned fit ( interior circle mostly matches up ) Be aware if you have a Stainless Steel portafilter like my premium ECM Synchronika's it will be a weak magnetic fit. Adequate, but not firm by any means. Quite the flare in this collar but the height is good. Much lighter than Steel, more durable than plastic. Half the price of a colored plastic collar with much weaker magnets.
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Reviewed in the United States on April 4, 2026
★★★★★ 4
High quality and fits well, I just wish the magnets were a little stronger
Color: White, Size: 51mm
It looks modern and stylish. The funnel fits my 51mm portafilter very well and does stay put if you're careful inverting it. It's solidly built and feels durable. It greatly helps keep the countertop tidy and allows me to use a large dose before tamping. The one improvement I would ask for is slightly stronger magnets that would hold more securely when I invert it. I tried to place it over the cup of grounds, and the funnel slipped off when I flipped them back over. It kinda works, you just have to be super careful. Better to just pour the grounds into it.
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Reviewed in the United States on November 19, 2025
★★★★★ 5
Excellent Funnel
Color: Black, Size: 58mm
Material is high quality. Magnets are strong. Funnel opening is wide. Angle of descent to the portafilter is perfect. Stays on the portafilter very strongly. I am extremely happy with this dosing funnel.
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Reviewed in the United States on June 7, 2026