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

$287.99 - $339.99

Description See Also: 2 Reviews 6 Questions Fitment Part Numbers
Item #BPS000L

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2 Reviews

3.5 out of 5 stars
  •   1 reviews
  •   0 reviews
  •   0 reviews
  •   1 reviews
  •   0 reviews

All Reviews

450x

Verified Purchaser
1 year 2 months ago SC
2 out of 5 stars
Durability
5/5
Ease of Installation
1/5
Performance
5/5
Power
5/5
Style
5/5
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
5 out of 5 stars
Durability
5/5
Ease of Installation
5/5
Performance
5/5
Power
5/5
Style
5/5
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

Question asked by Jacob

Question: Can I use the fmf mega bomb and this Muffler
Question asked Over 11 months ago
Question answered by Michael
User's contributor status: Top 10
Question answered Over 11 months ago
Answer: 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.

Question asked by RDmotto

Question: I have a 2018 Suzuki drz400sm. Would I have to rejet the carb to use this?
Question asked 1 year 4 months ago
Question answered by rknight
User's contributor status: Top 25
Question answered 1 year 4 months ago
Answer: 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.

Question asked by Nate

Question: 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?
Question asked 2 years 8 months ago
Question answered by MotoSportExpert
User's contributor status: Expert MotoSport Staff
Question answered 2 years 8 months ago
Answer: 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.

Question asked by Kurthfew

Question: Does this have a spark arrester?
Question asked 2 years 11 months ago

Question asked by Yguy

Question: Fuel injection
Question asked Over 3 years ago
Will adding these to my 2016 crf450r require remapping? Thank you
Question answered by MotoSportExpert
User's contributor status: MotoSport Staff Expert
Question answered Over 3 years ago
Answer: 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.

Question asked by Big Red

Question: Would this slip on fit a fmf header?
Question asked Over 5 years ago
Question answered by MotoSportExpert
User's contributor status: Expert MotoSport Staff
Question answered Over 5 years ago
Answer: 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.
Question answered by MotoSportExpert
User's contributor status: MotoSport Staff Expert
Question answered Over 5 years ago
Answer: 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 Black Stainless Steel End Cap 41-H1507
Aluminum With Black Stainless Steel End Cap 41-H45011
Aluminum With Black Stainless Steel End Cap 41-H4503
Aluminum With Black Stainless Steel End Cap 41-H4504
Aluminum With Black Stainless Steel End Cap 41-H4505
Aluminum With Black Stainless Steel End Cap 41-H4506
Aluminum With Black Stainless Steel End Cap 41-K25014
Aluminum With Black Stainless Steel End Cap 41-K2504
Aluminum With Black Stainless Steel End Cap 41-K4509
Aluminum With Black Stainless Steel End Cap 41-KT2511
Aluminum With Black Stainless Steel End Cap 41-KT3511
Aluminum With Black Stainless Steel End Cap 41-KT4511
Aluminum With Black Stainless Steel End Cap 41-S25010
Aluminum With Black Stainless Steel End Cap 41-S2505
Aluminum With Black Stainless Steel End Cap 41-S2507
Aluminum With Black Stainless Steel End Cap 41-S45011
Aluminum With Black Stainless Steel End Cap 41-S4505
Aluminum With Black Stainless Steel End Cap 41-SDS4000
Aluminum With Black Stainless Steel End Cap 41-Y2507
Aluminum With Black Stainless Steel End Cap 41-Y4503
Aluminum With Black Stainless Steel End Cap 41-Y4510
Aluminum With Black Stainless Steel End Cap 41-K45016