EXTRA 5% OFF 2+ ITEMSSee all eligible items and terms

Borla 40359 ProXS? Muffler - Un-Notched Neck

ProXS? Muffler 3" Offset Inlet/ 3" Center Outlet, 4" x
MyAutoPerformance
(20064)
Seller's other items
Contact seller
US $120.99
as low as $41.27/mo with
Condition:
New
2 available
Breathe easy. Free shipping and returns.
Hurry before it's gone. 1 person is watching this item.
Shipping:
Free delivery in 2 days - Arrives before Christmas
Get it by Fri, Dec 12 to 94104.
Located in: El Dorado Hills, California, United States
Returns:
30 days returns. Seller pays for return shipping.
Payments:
       .
Earn up to 5x points when you use your eBay Mastercard®. Learn moreabout earning points with eBay Mastercard

Shop with confidence

Top Rated Plus
Top rated seller, fast shipping, and free returns. Learn more- Top Rated Plus - opens in a new window or tab
eBay Money Back Guarantee
Get the item you ordered or your money back. Learn moreeBay Money Back Guarantee - opens new window or tab
Seller assumes all responsibility for this listing.
eBay item number:155153728546
Last updated on Dec 08, 2025 10:59:34 PSTView all revisionsView all revisions

Item specifics

Condition
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ...
Materials sourced from
United States
Warranty
1 Year
Brand
Borla
Manufacturer Part Number
40359
Body Height
4.000 in.
Body Length
14.000 in.
Body Width
9.500 in.
Construction
All Welded
Grade Type
Performance
Inlet Connection Type
Pipe
Inlet Outside Diameter
3.000 in.
Inlet Position
Center
Inlet Type
Single Center
Main Piping Diameter
3.000 in.
Material
T-304 Stainless Steel
Muffler Count
1
Off Road Use Only
NO
Outlet Outside Diameter
3.000 in.
Outlet Position
Offset
Outlet Type
Single Offset Outlet
Overall Length
19.000 in.
Prop 65 - Short Label
Proposition 65 Warning.JPG
Prop 65 (C, R or CR)
CR
Prop 65 Yes/No
Yes
Shape
Oval
Tip / Outlet Finish
N/A
Title Extended
ProXS Muffler 3in Offset/Center 14inx4inx9.5in Part # 40359
Performance Part
Yes
UPC
808422403597
Category

Item description from the seller

About this seller

MyAutoPerformance

99.7% positive feedback•66K items sold

Joined Aug 2005
Usually responds within 24 hours
We provide low prices and a big selection of performance car parts and accessories for most modern cars and trucks. Excellent customer service and pricing makes MyAutoPerformance the place to purchase ...
See more
Visit storeContact

Detailed seller ratings

Average for the last 12 months
Accurate description
4.9
Reasonable shipping cost
5.0
Shipping speed
5.0
Communication
5.0

Seller feedback (20,896)

All ratingsselected
Positive
Neutral
Negative
  • 6***o (673)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Ridiculously fast shipping, I had it delivered within 24 hours of purchasing it, faster than Amazon! Arrived in excellent condition in the original packaging, everything there just like it was listed. Packaged well, and was a great price considering it was free shipping. Would definitely purchase from this seller again! Thank you for an excellent all-around experience
    Chrome Turn Signal Relocation Kit 41mm Forks fits Harley Davidson (#166672879834)
  • w***y (124)- Feedback left by buyer.
    Past month
    Verified purchase
    Quality battery that arrived packaged well. Shipping was super fast (3 days) and in perfect condition. Great upgrade from my previous battery and price was very fair. Would highly recommend this seller!!
    Yuasa YT19BL-BS Maintenance Free AGM Battery for Motorcycles (#156647028198)
  • u***u (21)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    I ordered the these brake rotors and pads on one day and they we delivered the very next day !!! LOL I thought it would be at least a week before I received them . I definitely couldn't beat the price for everything because the DEALER'S PRICE was totally ridiculous !!! I would absolutely buy from this seller again when I need certain parts !!!
    Brembo OE For 18-20 Dodge Durango/12-15 Jeep Grand Cherokee/17-20 Grand Cherokee (#167146552325)
See all feedback

Product ratings and reviews

Learn more
4.8
51 product ratings
  • 46 users rated this 5 out of 5 stars
  • 2 users rated this 4 out of 5 stars
  • 2 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 1 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 40 reviews
  • by suzukitech23
    Aug 14, 2018Top favorable review

    Awesome sound!!!!

    Shipping was a day late but the product was in great shape and worked perfect. Sounds great on the truck. I would definitely recommend this product.

    Verified purchase: YesCondition: NewSold by: wickedwolfauto

  • by emgar_2367
    Sep 12, 2025

    Great Quality, Lighter than my OEM muffl...

    Great Quality, Lighter than my OEM muffler, perfect fitment

    Verified purchase: YesCondition: NewSold by: boneheadperformance

  • by ben.tw-60
    Apr 12, 2021

    Great product provides great tone and little drone.

    Excellent quality and provided great tone and sound for my f150 5.0. Not too loud but nice low rumble and loud growl when you are WOT. Sound is high performance and low drone gaining speed, no drone at all at highway speeds.

    Verified purchase: YesCondition: New

  • by ww1270001
    Aug 22, 2019

    Good tone!

    Put this in my 1999 Chevy K2500 5.7 Vortec and it’s pretty good. Not too loud and has a good rubble. No noise inside the cab unless the windows are down but not much. Highly recommend!

    Verified purchase: YesCondition: NewSold by: wickedwolfauto

  • by dpopoff81
    Jan 06, 2021

    WAP Guaranteed

    Seriously though, my 10 year old Chevy sounds amazing now. Nice tone, easy to install (kinda). They should pack an optional kit with two 3” long adapters from 3” od to 2.75” od. If you don’t have one of these on your Chevy I suggest you put one on ASAP, it will bring the moisture to your co pilot 😂

    Verified purchase: YesCondition: NewSold by: qaWbFT2jSni@Deleted

More to explore :