British Customs

GP Slip On Exhaust for Thruxton R


Regular price $899.95 Save $0.00

Only 5 items in stock!
GP Slip On Exhaust for Thruxton R
GP Slip On Exhaust for Thruxton R
GP Slip On Exhaust for Thruxton R
GP Slip On Exhaust for Thruxton R
GP Slip On Exhaust for Thruxton R
GP Slip On Exhaust for Thruxton R
GP Slip On Exhaust for Thruxton R
GP Slip On Exhaust for Thruxton R

GP Sip On Exhaust for Triumph Thruxton R by British Customs

The GP Exhaust is a truly handcrafted muffler. Step by step, each muffler is slowly, meticulously rolled and TIG welded from 100% stainless steel to create a muffler that evokes the golden era of motorcycle racing. GP-style exhaust usually only comes as part of a full exhaust system, requiring you to completely remove your old exhaust pipes and redo your air intakes in order to get them working. For riders seeking to give their modern classic a vintage road race look and sound, the GP Exhaust is the highest quality performance solution available.


  • Handmade exhaust by master technicians
  • 100% stainless steel construction
  • 2.5lbs per muffler (5 lb total) 
  • Repackable stainless steel mesh perf core baffle for optimal backpressure
  • Vintage road race looks and sound
  • Rubber mounted bracket for increased durability and easy installation
  • Proudly made in the USA

    To get the maximum Performance upgrade on your Triumph Thruxton R, try our Competition Header "X-Pipe" alongside the GP Slip On Exhaust. This Competition Use Only header upgrade opens up the exhaust and lets your bike run and sound as it should. If you are not comfortable with this installation please see your local Triumph dealer or call our team of Product Specialists toll free at +1 (877) 999-BRIT.



    Part Number

    Model Fitment


    2016+ Triumph Thruxton R


    Included Components:

      • Left and right GP slip on exhaust
      • Stainless Band Clamps
      • Mounting components

      Q: Do you have installation instructions for this part?

      A: Yes, we have developed a step by step Install Guide to assist in the home installation of this part. You can download the guide here. The Install Guide will also be emailed to you when your order ships.  

      Q: Do I need to remap after I install these pipes?

      A: Due to Triumph "Self Learning ECU" a Re-Map is not required. However, for additional Mapping flexibility, we recommend that you purchase and install a DynoJet Power Commander V. With this unit installed you can upload a custom MAP developed by DynoJet for our Exhaust products. These MAPs are available here.

        Return Policy

        We accept qualifying returns or exchanges within 30 days from the ship date of your order. To begin your return, please contact British Customs Customer Service here:

        Submit Ticket

        Items not returned in their original packaging or items that show signs of use will be subject to a re-stocking fee of 15% of the original purchase price. If an item is in unsellable condition, your return may be rejected. All returns are subject to approval once received by British Customs.

        Please note: Refunds do not include any shipping costs paid on your original order (if applicable)

        Some made-to-order or special order goods are exempt from the standard Return Policy. Wheels, tires, shocks, chemicals, speedometers, tachometers, and gift cards cannot be returned. 

        To complete your return, we require a receipt or proof of purchase.


        Due to the COVID-19 health crisis, we cannot accept returns on any gear, including helmets, jackets, gloves, etc.


        If you wish to return your order and exchange for another item, please list the item(s) you want to exchange for the returned item in the message to our customer service team. 

        Submit Ticket

        Refunds (if applicable)

        Once your return is received and inspected, we will notify you of the approval or rejection of your refund.

        If your return is approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment. You will receive a refund confirmation via email. 

        Sale items (if applicable)

        Sales items are eligible for return unless otherwise marked or excluded. Any refunds granted will be for the purchase price. Final Sale items are not eligible for return in any circumstance.

        We understand that when you make an order, you want your gear as quickly as possible and we will do our best to make that happen! 

        Our Shipping team fulfills orders Monday-Friday, excluding holidays. Orders will  typically ship within 1-2 business days of the order being placed. Orders placed after 2pm PST will ship the following day at the earliest. If you choose an expedited shipping method, please contact our customer service team to notify us. We will do our best to process the order as quickly as possible. 

        8-5pm PST M-F: +1 (850) 400 2708           24/7:

        A shipping confirmation email including carrier specific tracking information will typically be sent within 24 hours of an item shipping.  For example, if you place an order Monday night and it ships out Tuesday morning, you will receive your tracking information either Tuesday evening or Wednesday morning.

        Most orders will be shipped FedEx, however we do utilize USPS as well. 

        Free Shipping

        From time to time, British Customs may offer Free Shipping on orders over $199 that have a U.S. shipping destination. International destinations, US Territories, Alaska, and Hawaii are excluded from free shipping promotions. Orders will ship via Ground Shipping. Expedited shipping methods are available at checkout. Rates for these expedited options are calculated by the carrier and displayed at checkout. 

        Shipping Changes

        Shipping changes after the order is shipped, such as intercepts, address change, and will call pick-up may be subject to a $10 Service fee per shipment (this is simply passing along the fee billed to us by the carrier to make the change when in-transit).  

        International Shipping

        British Customs is not responsible for any duties, fee, or customs associated with any local state or province. 

        Order Cancellation

        See our Return Policy for details on order modifications / cancellations.

        Hear from real customers