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The hand-built stainless steel Head Pipe allows for one of the finest bolt-on modifications that you can add to your motorcycle or ATV. The unique design will enhance low to mid RPM power, making it the perfect choice for upgrading your stock system.
Built using 304 stainless steel designed for maximum durability, corrosion resistance and style.
It's a very well-made product, durable, expensive and three weeks on backorder; but definitely worth waiting for. Moto Sport came through the fastest of any other online retailer and a dollar cheaper, too♤
3 out of 5 stars
Ease of Installation
1 year 7 months ago
T-4 head pipe
Got one of these for on my crf450r dirtbike, because the stock titanium pipe is absolute junk, first time you lay the bike over the stock one is bent or crushed. This pipe is very strong, the stainless is way better and is only a touch heavier. Its pricy for just a headpipe but no other company makes this to mount to the stock silencer I have heard. Another thing is that there are no mounts for the pipe guard, but when the pipe is strong like this one, maybe its not necessary? Overall good product
5 out of 5 stars
Ease of Installation
1 year 11 months agoLocation: Williamsburg, PA 16693, USA
Pro Circuit T-4 Head Pipe - Stainless Steel
I had big dents in my stock head pipe from rocks hitting it. it was very easy to install this Stainless Steel pipe and seems pretty durable hopefully it holds up. very cheap alternative compared to titanium
"This is a stock replacement head pipe"
This is what is written on the description; it means that it has the same diameters and same shapes of the OEM pipes?
If it's so, has no improvement, right?
It should be possible to have a "real" pictures of the part?
Does it come with the midpipe?
Top 1 Contributor
Over 10 months ago
Here is the information from ProCIrcuit's website:
Fits The Following Bikes:
KTM 625 SXC 2004
KTM 640 LC4 2004
Head Pipe Description:
The head pipe is a critical part of your exhaust system, and once in a while you may crash, or get a rock to the head pipe causing damage which could result in losing power. This replacement is perfect for those unfortunate accidents, and is designed to fit stock OEM silencers or any Pro Circuit Slip-On Silencer.
Increase in low-to-mid-range power Stainless steel construction for increased strength and durability Designed to fit OEM silencers or Pro Circuit Slip-On Silencers Includes mid pipe
Note: This is a stock replacement head pipe. Mid pipe is not shown in photo.
Will this fit on a 2006 kx250f with a stock muffler?
MotoSport StaffExpertTop 1 Contributor
1 year 4 months ago
Yes, Pro Circuit says their headers will work with the stock OEM silencer or any Pro Circuit Slip-On Silencer making it the perfect choice for upgrading your stock system. This is for Pro Circuit headers only. If you choose a different manufacturer, fitment to your stock (OEM) silencer is not guaranteed.
I have a 2010 CRF450R with a Ti-4R full system. Will this header fit my Ti muffler? Pro Circuit wants $300 for the header alone
1 year 9 months agoLocation: Portland, OR, USA
This will only work with the OEM Muffler or a Pro Circuit Slip-on Muffler. Unfortunately it would not work with a Pro Circuit full system as they use different mid-pipes and headers that the slip-on exhausts. I believe you will have to get that replacement header directly from Pro Circuit.