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FMF Exhaust - 44443 - Slip On Muffler - S/S with Carbon - Factory 4.1 RCT, image 1

FMF

FMF Exhaust - 44443 - Slip On Muffler - S/S with Carbon - Factory 4.1 RCT

Exhaust - Slip-OnSKU 6107596

Cheapest we found

$1,162.95

at XPERT Moto Gear

$1,162.95 lowest$1,181.99 highest

2 recent in-stock prices · spread $19.04 (2%)

Based only on in-stock prices checked in the last 30 days. 3 stores checked; dates for every store are shown below.

Recorded store prices

Prices we recorded when we last checked each store for this exact variant.

XPERT Moto Gear$1,162.95CheapestIn stockEverest Motorcycles$1,181.99In stockMotoHeaven$1,186.99Out of stock

Product details

The FMF Factory 4.1 RCT is a direct slip-on replacement for the standard muffler on the Yamaha YZ450F, WR450F and YZ450FX. It pairs an aluminium canister in a natural finish with a stainless steel midpipe and a carbon fibre end cap, and slips onto the standard head pipe.

FMF's Resonance Chamber Technology is applied both inside and outside the canister, allowing a shorter overall body that sits closer to the engine. That Factory Forward Engineering layout centralises mass and leaves less of the muffler exposed in a crash. The RTS (Rapid Tuning System) end cap arrangement makes it straightforward to swap inserts.

Built for motocross, enduro and off-road riders running a 450 four-stroke. This muffler is supplied for closed course competition use only and is not certified for Australian road use.

Price history

Recorded changes for this exact variant.

Step chart of dated store-price observations. Solid lines show confirmed crawl coverage, dashed lines show overdue missed-check spans, and every line stops at the last confirmed price.

  1. 1XPERT Moto Gear3 points · last checked 23 Aug 2026
  2. 2Everest Motorcycles2 points · last checked 23 Aug 2026
  3. 3MotoHeaven1 point · last checked 22 Aug 2026

Solid steps show periods confirmed by the store’s change-only price history and completed crawl record: if the price had changed at a check, another point would appear. Dashed steps show overdue periods with no completed crawl confirmation. Every line stops at that listing’s last confirmed check and is never extended to today. Prices are not live and may have changed since the last point shown.

How we collect and compare prices
Cheapest we found: $1,162.95 · XPERT Moto GearJump to comparison