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Bill's Pipes SA-4 Series Slip-On Exhaust - Dual
Bill's Pipes SA-4 Series Slip-On Exhaust - Dual

$512.99 $569.99
10% Off - Save $57.00

Description See Also: 2 Reviews 6 Questions Fitment Part Numbers
Item #BPS000M

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2 Reviews
3.5 out of 5 stars
5 Star   1 4 Star   0 3 Star   0 2 Star   1 1 Star   0
All Reviews
450x Verified Purchaser
1 year 2 months ago SC
Durability5/5Ease of Installation1/5Performance5/5Power5/5Style5/5
Bad Quality Control

I purchase the Bills SA-4 for a 07 crf450x. It arrived without a mid pipe. It took Bills a week just to ship that. When it arrived I started the install. Come to find out the canister nor mid pipe had the "hooks" for the springs to connect to. Literally there was nothing to hold the canister to the mid pipe. Bills also does not list their contact info on their own website... I returned this product for a pro circuit t4.

Topham132
Over 3 years ago Cedar City, UT, USA
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Best pipe!

Just got this for my Rmz450 by far the best pipe I have ever ran! Very pleased with bills! Would choose it over any other brand I have had (fmf ect)

6 Questions
Answered:   5
Not Yet:   1
Jacob
Q: Can I use the fmf mega bomb and this Muffler
Over 11 months ago
Michael
Top 10
Over 11 months ago
A: No Bills fitments are a different design from FMF. Even if the diameter were to be similar the tuning and power gains would never match up. Do not recommend.
RDmotto
Q: I have a 2018 Suzuki drz400sm. Would I have to rejet the carb to use this?
1 year 4 months ago
rknight
Top 25
1 year 4 months ago
A: Generally with slip on's you do not have to re jet but it will really depend on how the bike runs with it on.
Nate
Q: I have a 2012 yz450f would I need to change my fuel mapping if I put the bill's sa4 slip on, on my bike?
2 years 8 months ago
MotoSportExpert
Expert MotoSport Staff
2 years 8 months ago
A: Generally with a slip on exhaust you will not need a programmer. I would recommend installing the exhaust and riding the bike to see how it is running then tuning your bike from there if necessary.
Kurthfew
Q: Does this have a spark arrester?
2 years 10 months ago
Yguy
Q: Fuel injection
Over 3 years ago
Will adding these to my 2016 crf450r require remapping? Thank you
MotoSportExpert
MotoSport Staff Expert
Over 3 years ago
A: Yes. You should always properly tune your bike after getting an aftermarket exhaust to allow it to run at its optimal level and give you the most performance. Failure to properly tune your bike will void your warranty.
Big Red
Q: Would this slip on fit a fmf header?
Over 5 years ago
MotoSportExpert
Expert MotoSport Staff
Over 5 years ago
A: The Bill's Slip-on is made to fit over the stock header. So as long as the FMF header you use is the same diameter as stock and will work with a stock muffler then you will have no problem.
MotoSportExpert
MotoSport Staff Expert
Over 5 years ago
A: The Bill's Slip-on is made to go over the stock header so as long as the FMF header is the same diameter as stock, and will work with a stock muffler then you will have no problem.
Fitment

See all bikes that this part fits...

See Fitments
# Part Numbers
Product Variant Manufacturer Part #
Aluminum With Carbon Fiber End Cap 41-H45013
Aluminum With Carbon Fiber End Cap 41-H25014