Which Dirt Bikes Are Covered by Pro Circuit's 2027 Exhaust Systems?

Updated

Pro Circuit's 2027 exhaust systems are rolling out through fall 2026, and the models named so far are the Husqvarna FC 250 and FC 450, Honda CRF250R/RX and CRF450R/RX, KTM 250 SX-F, and Yamaha YZ250F. If your bike is on that list, you can start comparing system tiers now; if it isn't, the lineup is still expanding, so check back as the season progresses.

Confirmed 2027 Applications

Brand Models
Husqvarna FC 250, FC 450
Honda CRF250R, CRF250RX, CRF450R, CRF450RX
KTM 250 SX-F
Yamaha YZ250F

These are the fitments Pro Circuit has announced for the 2027 systems. The announcement frames them as options for riders who have recently bought a new dirt bike, so the list reflects current-generation motocross and off-road models rather than older machines.

What the 2027 Lineup Includes

Four system families are named for 2027, split by material and intended use:

  • Ti-6 BC — full titanium, built to AMA/FIM sound regulations, positioned for professional racers in AMA Supercross or Motocross.
  • Ti-6 — full titanium, meets AMA amateur sound requirements, includes a removable USFS-approved spark arrestor, aimed at serious amateur and off-road racers.
  • T-6 Full System — stainless, meets AMA amateur sound requirements, removable USFS-approved spark arrestor, for amateur racers and off-road riders wanting full-system gains.
  • T-6 Stainless Slip-On — retains the stock head pipe, meets AMA amateur sound requirements, removable USFS-approved spark arrestor, positioned as a budget-friendly upgrade.

The practical split: Ti-6 BC for pro-level competition where FIM sound limits apply, Ti-6 for amateurs and off-road who want titanium plus a spark arrestor, T-6 Full System for full-system performance in stainless, and the T-6 Slip-On for a simple, lower-cost change.

How to Use This If Your Bike Is Listed

  1. Confirm your exact model and year against the list above — for Honda, note whether you have the R or RX variant, since both are covered but they are different bikes.
  2. Decide your riding category: professional racing (Ti-6 BC), serious amateur or off-road competition (Ti-6), or amateur/off-road with an eye on cost (T-6 Full System or Slip-On).
  3. Check the sound and spark-arrestor requirements of the venues you ride. The Ti-6 BC is the only one described as meeting AMA/FIM regulations; the other three meet AMA amateur requirements and carry a removable USFS-approved spark arrestor.
  4. Verify fitment and availability on the product page before ordering, since the systems are being released gradually through the fall rather than all at once.

If Your Bike Isn't Listed

The 2027 rollout is described as ongoing throughout the fall, so the absence of a model today doesn't mean it won't be added. Before planning a purchase around an unlisted bike, confirm the specific application with Pro Circuit directly rather than assuming a 2026 or earlier system will carry over.

Ordering Notes Worth Knowing

Pro Circuit advertises free freight on retail orders over $250 within the USA, excluding Alaska and Hawaii, and only for online orders. Shipping costs to Alaska and Hawaii are quoted by phone, and international orders or any order over $1,500 must go through the sales office at (951) 738-8050. Keep those thresholds in mind if you're ordering a full system plus accessories in one go.