In Pro-Circuit’s exhaust lineup, the T-4 S/A Silencer is a four-stroke option that manages to pack versatility, peak performance, and a light weight into the same exhaust all at one time.
Pro circuit does it by starting with a lightweight construction of premium aluminum and stainless steel before they integrate features like a removable USFS spark arrestor, a tunable end cap, and an optional quiet core insert that helps tame your bike’s decibels.
Together these features let the T-4 S/A give you a reliable power increase in a form that’s versatile enough for unrestricted track use, riding on protected trails, or lowering your sound level on crowded trails.
Lightweight, strong aluminum and stainless construction
Increases power and throttle response
Tunable end cap alters power band to rider’s preference
Attaches to both OEM and Pro Circuit header pipes
Included USFS approved screen-type spark arrestor
Removable end cap for simple servicing/repacking
Round aluminum canister body and extruded aluminum end cap
Nickel plated connector
Quiet core insert available for reduced noise (sold separately)
This pipe came installed on my 06 YFZ450...I noticed that the slip-on was noticably larger that the stock head pipe. The exhaust leaks but nothing to worry about. I would deff. concider this pipe again, but I do think that the design isnt the greatest because both mounting tabs are broken on my pipe.
Purchased for 2008 Kxf250. Looks good, sounds good, but not any better then stock on this bike, Performance i think it added a bit of over rev. Combined with header it added bottom mid and top, not alot but noticeable. Overall looks nice, performs nice, sounds nice.
good pipe from stock but has some problems i have a trx 400ex 2005 bought the slip on and didnt seat up to the stock head pipe all the way, left 1/4in gap and after runing in the dunes it started to rattle and can see the blow by on the header pipe. the mounting bracket broke after a year. matbe it was just this one,but i dont want to take another chance.
I put this on my Honda crf450x. Wow! It boosted the low and mid range noticably. I can't believe how much more power I have in 2nd and 3rd gear. It's especially noticable on the dunes. I love the sound too. This one is louder than many others, but I wanted it that way. Keeps those hikers out of my way on the single tracks. I also have the FMF power bomb header pipe and the JD jetting kit, this combination works great!
please reply to me someone. im going to buy this product. but first i need to know this. im going to take out my spark arrestor/ quiet core in my stock exhaust. will taking that out cause any damage to my engine? or lose hp? because i have heard that taking out the spark arrestor/quiet core can cause valve damage. so get back at me on that.
i look for a pipe for about a month and i'm very happy i went with the pro circuit T-4. it is about 1/2 weight over stock. its sounds 100 times better then the stock unit and gave me that power bump i was looking for...