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Pro Circuit Stainless Steel Header - 4QY01660H

  • Part #: 446806
  • Manufacturer Part #: 4QY01660H

MSRP Price: $274.95

Our Price: $247.46

You Save:
$27.49 (10%)
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Overview of Pro Circuit Stainless Steel Header - 4QY01660H

Owned and operated by Mitch Payton, Pro Circuit is a custom precision engine and suspension building facility. Pro Circuit's owner has invested over 25 years in engine building and machine shop techniques
  • Stainless steel head pipes are specially designed to improve performance when compared to stock head pipes
  • Built from 304 stainless steel to ensure maximum durability and corrosion resistance


  • Note:Rejetting is recommended when using this headpipe

    Note: Exhaust discoloration (blueing) is caused by engine conditions such as cam timing, fuel-air mixture, operating temperature, etc. It is not the result of defective manufacturing, therefore it is not covered by any warranty. See the Chems/Lubes section for products to help remove or prevent exhaust discoloration.

Specs for Pro Circuit Stainless Steel Header - 4QY01660H

Color - Primary Silver
Type - Exhaust - Head Pipes & Mid Pipes Head Pipe
Units Each
Weight 3.81 lbs

Specs for Pro Circuit Stainless Steel Header - 4QY01660H

Color - Primary Silver
Type - Exhaust - Head Pipes & Mid Pipes Head Pipe
Units Each
Weight 3.81 lbs

Fitment for Pro Circuit Stainless Steel Header - 4QY01660H

See if this part fits your ride

Part 446806 fits the following machines

Yamaha
  • 2005 Yamaha YFM660R Raptor
  • 2004 Yamaha YFM660R Raptor
  • 2003 Yamaha YFM660R Raptor
  • 2002 Yamaha YFM660R Raptor
  • 2001 Yamaha YFM660R Raptor
  • 2005 Yamaha YFM660RLE Raptor Limited Edition
  • 2004 Yamaha YFM660RLE Raptor Limited Edition
  • 2003 Yamaha YFM660RLE Raptor Limited Edition
  • 2002 Yamaha YFM660RLE Raptor Limited Edition

Stainless Steel Header - 4H07450H

4 out of 4 reviews
Fitment:
Sound:
soft loud
Loud
Finish:
Performance:


Fitment:
Sound:
soft loud
Loud
Finish:
Performance:

Good Header

The original header flange was way too thick to use the drz400 header bolts so I had to take the flange off of the stock pipe and slightly modify it to be used with the new header. Was a little hard to get it to bolt up to a Yoshi slip-on too but I was expecting that. Overall it's a great mod for the price, I could feel the bike gained some mid range and top end power.

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Fitment:
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Worked for me.

had to replace stock header on my 06 crf250x, I was a little concerned about it fitting as my local dealer told me it probably wouldn't. I phoned Dennis Kirk and they confirmed with their tech that it would fit and when it came I had no problems installing. I also saved a reasonable amount of money buying thru Dennis Kirk , which was key in making the purchase in the first place.

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Fit/Finish:
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Value:
Quality:
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Better performance than stock and much cheaper.

I had to replace the header on my 450 due to damage to the stocker. This one was much cheaper than replacing with OEM and I saw increased performance over the stocer (in it's pre-damaged condition).

Review By:

from St. Paul, MN

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Instructions and Manuals for Pro Circuit Stainless Steel Header - 4QY01660H