Legendary Service... Ask Your Friends - Since 1969
Need Assistance?
Over 150K Powersport Items - In-Stock and ready to ship today! View tires, apparel, helmets, exhaust and more!

Pro Circuit T-4 4-Stroke Silencer w/Mid-Pipe - 4QY86350

  • Part #: 446479
  • Manufacturer Part #: 4QY86350

MSRP Price: $374.95

Our Price: $337.46

You Save:
$37.49 (10%)
1 on Hand

Overview of Pro Circuit T-4 4-Stroke Silencer w/Mid-Pipe - 4QY86350

  • Designed to boost output throughout the powerband
  • Fine-tune your power delivery by changing end caps(See T-4 Replacement End Caps under Exhaust Replacement Parts and Accessories)
  • Lighter than stock
  • Extruded 6063 aluminum silencer resists oxidation and features long-lasting packing material
  • Quick access to the U.S. Forest Service approved screen spark arrester through removable end cap tip
  • Can be used with OEM or Pro Circuit head pipe (sold separately)
  • This silencer comes with a 1.75 in. diameter end cap
  • Connector pipe included

Included Items:
(1) Silencer
(1) 8mm-1.25x60mm Flanged shoulder bolt
(1) 8mm Medium fender washer
(1) 8mmx38mm Spacer
(1) Instructions

Specs for Pro Circuit T-4 4-Stroke Silencer w/Mid-Pipe - 4QY86350

Color - Primary Chrome
Color - Primary Silver
Style Canister Muffler
Type Muffler/Silencer w/Spark Arrestor
Units Each
Weight 4.81 lbs

Specs for Pro Circuit T-4 4-Stroke Silencer w/Mid-Pipe - 4QY86350

Color - Primary Chrome
Color - Primary Silver
Style Canister Muffler
Type Muffler/Silencer w/Spark Arrestor
Units Each
Weight 4.81 lbs

Fitment for Pro Circuit T-4 4-Stroke Silencer w/Mid-Pipe - 4QY86350

See if this part fits your ride

Part 446479 fits the following machines

Yamaha
  • 2004 Yamaha YFM350X Warrior
  • 2003 Yamaha YFM350X Warrior
  • 2002 Yamaha YFM350X Warrior
  • 2001 Yamaha YFM350X Warrior
  • 2000 Yamaha YFM350X Warrior
  • 1999 Yamaha YFM350X Warrior
  • 1998 Yamaha YFM350X Warrior
  • 1997 Yamaha YFM350X Warrior
  • 1996 Yamaha YFM350X Warrior
  • 1995 Yamaha YFM350X Warrior
  • 1994 Yamaha YFM350X Warrior
  • 1993 Yamaha YFM350X Warrior
  • 1992 Yamaha YFM350X Warrior
  • 1991 Yamaha YFM350X Warrior
  • 1990 Yamaha YFM350X Warrior
  • 1989 Yamaha YFM350X Warrior
  • 1988 Yamaha YFM350X Warrior
  • 1987 Yamaha YFM350X Warrior
4.1 / 5.0
7 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
4
2
0
0
1
Finish
4.7 / 5
Performance
4.0 / 5
Loudness
Very Quiet
Average
Very Loud
Finish
5 / 5
Performance
5 / 5
GOOD EXHAUST
It´s very good exhaust, good quality, good performance.
Too much better than leovince or FMF.
September 26, 2009
Finish
5 / 5
Performance
3 / 5
nice pipe
this was well made but the T-4 4-Stroke Silencer Part #448937 didn't fit my stock 2001 drz400s head pipe, It looked well made but i sent it back , Not sure if a different part number would have fit. I ended up just getting a full system from another maker.
October 7, 2011
Finish
5 / 5
Performance
5 / 5
More power better sound!
Bought for my '95 KLX650R and am very happy. I replaced a cheap aftermaket silencer that rattled. Huge upgrade! Fit perfect sounds awesome, and better power.
May 27, 2013
Finish
5 / 5
Performance
5 / 5
Nice Pipe
Good sound, good power. Quiets down considerably when at cruising speed. I needed to re-jet but that helped with power as well.
August 17, 2010
Finish
4 / 5
Performance
5 / 5
good pipe
Put on 03 wolverine sounds nice and throaty and not too loud . nice machine welds on canister - welds on mid pipe not so nice . fit well but had to cut a slot on end of pipe so hose clamp could compress the seam
January 11, 2011
Finish
5 / 5
Performance
4 / 5
No Review Title Entered By User
No Review Text Entered By User
May 6, 2011
Finish
4 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
1 / 5
No Review Title Entered By User
No Review Text Entered By User
May 7, 2011
Start typing your question and we'll check if it was already asked and answered. Learn More
No questions have been asked about this item. Be the first!

Instructions and Manuals for Pro Circuit T-4 4-Stroke Silencer w/Mid-Pipe - 4QY86350