Exhaust > Pro Circuit Exhaust Systems, Slip-Ons & Silencers

EXHAUST SYSTEMS, SLIP-ONS & SILENCERS -YAMAHA

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Features

  • Pro Circuit’s newest systems offer top-of-the-line performance and power
  • Complete systems from front to back
  • Ti-4 GP systems feature high-quality grade-two aerospace titanium throughout to provide huge weight savings and unique highlights
  • T-4 GP systems feature an aluminum canister and high-grade stainless steel mid-pipe
  • Both are packed with performance features tailored to the demands of serious racers and developed to lower and centralize the machine’s center of gravity, which improves handling and critical clearances
  • In addition to an instant hook-up under power, the systems also offer huge horsepower gains across the rpm range
  • Each model has been rigorously track- and dyno-tested to yield peak performance
  • Inspired by the T-4, the Ti-4 system utilizes high-quality grade-two aerospace titanium to provide huge weight savings and unique highlights
  • Advanced design ensures lightning-quick throttle response and faster, stronger response during hard acceleration
  • CNC-machined modular end-cap design provides tunable power, with effortless reshaping to the machine’s powerband
  • Extensively track- and dyno-tested
  • Silencers include wire-meshed spark arrester that can be removed for closed-course racing
  • Steel Allen head screws make repacking an easy task
  • Exclusive E-glass pillow packing
  • Complete systems come with stainless steel header
  • Can be used with OEM stock or a Pro Circuit header
  • Improved power delivery and exhaust note
  • Body is made from lightweight 6061 T-6 brushed aluminum and the end cap and intake tube are stainless steel
  • Tunable end caps allow fine-tuning of power delivery for different types of riding and terrain
  • Silencers include wire-meshed spark arrester that can be removed for closed-course racing
  • Steel Allen head screws make repacking an easy task
  • Complete systems include stainless steel header
  • Exclusive E-glass pillow packing
  • Revolutionary new system uses a longer aluminum body and special internal E-glass packing to lower noise output to legal dB without sacrificing power
  • Produces an impressive gain in horsepower when compared to OEM
  • Stainless steel intake tube and FIM-approved end cap
  • Completely hand-assembled and -welded for a fit and finish that would rival any Factory Works part
  • Lightweight aluminum mounting brackets
  • Wire-meshed removable spark arrester
  • Modular end caps for tunable power

Images

EXHAUST SYSTEMS, SLIP-ONS & SILENCERS -YAMAHA

  • Ti-4 AND T-4 GP LOW BOY SYSTEMS
  • Ti-4 TITANIUM SYSTEMS AND SLIP-ONS
  • T-4 SYSTEMS AND SLIP-ONS
  • TYPE 496 SPARK ARRESTER SILENCER


General

Part # Description Retail
1820-0331  FITS MODEL: TT-R50 06-07 - T-4 system   $324.95 
1820-0332  FITS MODEL: TT-R50 06-07 - Ti-4 system   $424.95 
4Y00090  FITS MODEL: TT-R90 00-07 - T-4 system   $264.95 
4Y00125  FITS MODEL: TT-R125 00-07 - T-4 system   $264.95 
4Y00225  FITS MODEL: TT-R225 99-04 - T-4 slip-on   $324.95 
1821-0323  FITS MODEL: TT-R230 05-07 - T-4 slip-on   $324.95 
4Y00250  FITS MODEL: TT-R250 99-06 - T-4 slip-on   $324.95 
4Y012501  FITS MODEL: WR250F 01-02 - T-4 slip-on   Not given 
1821-00551  FITS MODEL: WR250F 01-02 - Type 496 spark arrester silencer - Requires mount kit PART #1861-0021   Not given 
1820-0130  FITS MODEL: WR250F 03-06 - Ti-4 GP Low Boy system   $849.95 
4Y03250-TI1  FITS MODEL: WR250F 03-06 - Ti-4 slip-on - Requires mount kit PART #1861-0021   Not given 
4Y032501  FITS MODEL: WR250F 03-06 - T-4 slip-on - Requires mount kit PART #1861-0021   Not given 
4Y03250-4961  FITS MODEL: WR250F 03-06 - Type 496 spark arrester silencer - Requires mount kit PART #1861-0021   Not given 
1821-0763  FITS MODEL: WR250F 07 - T-4 slip-on   $424.95 
4Y01250  FITS MODEL: YZ250F 01-02 - T-4 slip-on   $424.95 
1821-0055  FITS MODEL: YZ250F 01-02 - Type 496 spark arrester silencer   $474.95 
1820-0130  FITS MODEL: YZ250F 03-05 - Ti-4 GP Low Boy system   $849.95 
4Y03250-TI  FITS MODEL: YZ250F 03-05 - Ti-4 slip-on   $524.95 
4Y03250  FITS MODEL: YZ250F 03-05 - T-4 slip-on   $424.95 
4Y03250-496  FITS MODEL: YZ250F 03-05 - Type 496 spark arrester silencer   $474.95 
1820-0333  FITS MODEL: YZ250F 06 - Ti-4 GP Low Boy system   $849.95 
1821-0412  FITS MODEL: YZ250F 06 - Ti-4 slip-on   $524.95 
1821-0410  FITS MODEL: YZ250F 06 - T-4 slip-on   $424.95 
1821-0411  FITS MODEL: YZ250F 06 - Type 496 spark arrester silencer   $474.95 
1820-0525  FITS MODEL: YZ250F 07 - Ti-4 GP Low Boy system   $849.95 
1820-0557  FITS MODEL: YZ250F 07 - T-4 GP Low Boy system   $749.95 
1821-0565  FITS MODEL: YZ250F 07 - Ti-4 slip-on   $524.95 
1821-0564  FITS MODEL: YZ250F 07 - T-4 slip-on   $424.95 
1820-0722  FITS MODEL: YZ250F 08 - Ti-4 GP Low Boy system   $899.95 
1820-0721  FITS MODEL: YZ250F 08 - T-4 GP Low Boy system   $749.95 
1821-0780  FITS MODEL: YZ250F 08 - Ti-4 slip-on   $549.95 
1821-0779  FITS MODEL: YZ250F 08 - T-4 slip-on   $424.95 
1821-0049  FITS MODEL: WR400F 98-00 - T-4 slip-on - Requires mount kit PART #1861-0021   $424.95 
1821-0050  FITS MODEL: YZ400F 98-99 - Type 496 spark arrester silencer - Requires mount kit PART #1861-0021   $474.95 
1821-0049  FITS MODEL: YZ400F 98-99 - T-4 slip-on - Requires mount kit PART #1861-0021   $424.95 
1821-0050  FITS MODEL: WR426F 01-02 - Type 496 spark arrester silencer - Requires mount kit PART #1861-0021   $474.95 
1821-0049  FITS MODEL: WR426F 01-02 - T-4 slip-on - Requires mount kit PART #1861-0021   $424.95 
1821-0050  FITS MODEL: YZ426F 00-02 - Type 496 spark arrester silencer - Requires mount kit PART #1861-0021   $474.95 
1821-0049  FITS MODEL: YZ426F 00-02 - T-4 slip-on - Requires mount kit PART #1861-0021   $424.95 
1821-0050  FITS MODEL: WR450F 03-06 - Type 496 spark arrester silencer - Requires mount kit PART #1861-0021   $474.95 
1820-0131  FITS MODEL: WR450F 03-06 - Ti-4 GP Low Boy system   $849.95 
4Y03450-TI  FITS MODEL: WR450F 03-06 - Ti-4 slip-on - Requires mount kit PART #1861-0021   $524.95 
4Y034501  FITS MODEL: WR450F 03-06 - T-4 slip-on   Not given 
4Y03450-496  FITS MODEL: WR450F 03-06 - Type 496 spark arrester silencer - Requires mount kit PART #1861-0021   $474.95 
1821-0764  FITS MODEL: WR450F 07 - T-4 slip-on   $424.95 
1820-0131  FITS MODEL: YZ450F 03-05 - Ti-4 GP Low Boy system   $849.95 
4Y03450-TI  FITS MODEL: YZ450F 03-05 - Ti-4 slip-on   $524.95 
4Y03450  FITS MODEL: YZ450F 03-05 - T-4 slip-on   $424.95 
4Y03450-496  FITS MODEL: YZ450F 03-05 - Type 496 spark arrester silencer   $474.95 
1820-0724  FITS MODEL: YZ450F 06 - Ti-4 GP Low Boy system   $899.95 
1820-0723  FITS MODEL: YZ450F 06 - T-4 GP Low Boy system   $749.95 
1821-0415  FITS MODEL: YZ450F 06 - Ti-4 slip-on   $524.95 
1821-0413  FITS MODEL: YZ450F 06 - T-4 slip-on   $424.95 
1821-0414  FITS MODEL: YZ450F 06 - Type 496 spark arrester silencer   $474.95 
1820-0724  FITS MODEL: YZ450F 07 - Ti-4 GP Low Boy system   $899.95 
1820-0723  FITS MODEL: YZ450F 07 - T-4 GP Low Boy system   $749.95 
1820-0724  FITS MODEL: YZ450F 08 - Ti-4 GP Low Boy system   $899.95 
1820-0723  FITS MODEL: YZ450F 08 - T-4 GP Low Boy system   $749.95 
1821-0782  FITS MODEL: YZ450F 08 - Ti-4 slip-on   $549.95 
1821-0781  FITS MODEL: YZ450F 08 - T-4 slip-on   $424.95 
1821-0416  FITS MODEL: XT600E 90-04 - T-4 slip-on   $374.95 

Descriptions and notes

FOR YAMAHA 4-STROKES

The product of state-of-the-art technology and extensive eal-world testing, Pro Circuit 4-stroke systems boost overall performance with explosive bottom, mid range and peak power. And because they’re constructed to withstand even the most abusive conditions, these systems are sure to give you years of unrivaled performance off-road or on the track.

This item appears on page 482 of the OffRoad Catalog