Collection: USFS Approved 2020-2024 Beta-KTM-Husqvarna-GasGas-Sherco Enduro Spark Arrestors

What is it?- A turbine style spark arrestor that slips into your OEM stock silencer. Because it is a turbine style spark arrestor, there is no screen to maintain or clog up.  Instead of filtering the exhaust flow with a screen, the spark arresting is accomplished using the centrifugal force created when spinning the exhaust flow through the turbine.

What bikes does it fit?- The TSI-1-2.0 & TSI-1-2.1 models fits KTM-Husqvarna-GasGas 250-300cc 2020-2024 TPI & TBI two-strokes, the TSI-1-3.0 & TSI-1-3.1 fit Beta 2020-2024 200-300cc RX, RR and RR Racing two-strokes, & the TSI-1-4.0 fits Sherco 2020-2024 250-300cc SE Racing & Factory two-strokes. We have new models for 2022-2024 125-150cc KTM-Husqvarna-GasGas & Sherco two-strokes now also.

What is so special about it?- First off is the USFS approval which is laser engraved on the outside of the aluminum end cap for easy identification by USFS law enforcement. Next up is the Patented ZERO RESTRICTION design of the internal components.  This design is tested and proven to flow the same as the stock TPI silencer, so after installation in your stock silencer, there is zero change in the flow through the silencer.  This means your bike will run exactly as the manufacturer intended with no risk of causing excessively lean or rich fuel conditions, disruptions to exhaust pulse timing, or bleed down rate, all of which can significantly reduce performance.  None of the other spark arrestors on the market today (turbine or screen type) can make this claim, we have tested all types, and the flow results are all over the map with the worst performer producing a 55% reduction in flow rate. Check out the KTM TPI flow data to see just how much variability there is across spark arrestor manufacturers (click for KTM TPI flow data). Flow comparison for other brands are here (click for Beta flow data) (click  for Sherco flow data).

Unlike our turbine style spark arrestor competitors our CNC cut 6061-T6 end caps are replaceable via two bolts and available separately in multiple anodized colors.

Less Sound = More Ground-  Stock KTM TPI silencers are very quiet @ about 91dB when tested per SAEJ1287, addition of our spark arrestor increases sound output by less than 1dB which makes it the quietest turbine style on the market by 2dB which is a lot.

New Technologies- It actually did take some rocket science to achieve these incredible flow rates, specifically rocket nose cone design theory, gas turbine fin design concepts, and application of computational fluid dynamics (CFD) to all but eliminate turbulent flow through the spark arrestor.  These are all new technologies for turbine spark arrestor design, which has remained fundamentally unchanged since the original design was disclosed by Jack Krizman in his 1968 patent.

Installation-Installation into the OEM stock silencer takes about 1 hour, check out the installation instructions for additional information (link to printed version, link to video version). We also offer installation service for customers who don't have the time, expertise, or tools to do the installation themselves.  Installation cost is $40.  Just ship us your undamaged OEM silencer & we will install the spark arrestor for you and ship it back within 2 business days. So package that silencer up & ship to:

Spanish Fly Racing, Inc.
4794 W. Case jct.
Prescott, AZ 86305

We will install your new sparky, package it back up, then send you an e-mail invoice, you pay the invoice (PayPal or Credit Card) and we drop off your silencer at your preferred shipper.  Please give us a call or send us an e-mail before shipping so we can verify turn around time & get your contact information & color choice.