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Exhaust Muffler Borla

4 on 19 ratings
  • Features:
    • Universal Mufflers
    • High Quality 300 Series Stainless Steel Finish
    • Street Commanding Sound
    • Million Mile Warranty
  • Value-priced BORLA(R) ProXS mufflers share many of the hottest features of our performanceline. Including high-quality 300 Series austenitic stainless steel construction, streetcommandingsound and our Million Mile Warranty. Sizes are available for import anddomestic cars and trucks.
  • Fitment Warning:
    • This is a Universal/Non Application Specific Product. To install this part, you made need to cut, weld, or make other modifications to your vehicle.
This item is not specific to any vehicle. Click here to learn more
Universal
11 In Stock
Best Price:

$352.01 USD
$422.41 USD
Brand Borla
Part # B25400287
Condition New
Warehouse B
Borla

Borla Exhaust Muffler 400287
  • ProXS Muffler
  • ProXS Muffler; Dual/Dual; Oval Body; 2.25 in. Inlet; 2.25 in. Dual Outlet; 19 in. x 4 in. x 9.5 in. Body Size; 24 in. Overall Length; Unnotched; T-304 Stainless Steel;
    • BORLA is the pioneer and leader in the design and manufacture of stainless steel performance exhaust. Company began three decades ago as a manufacturer of exhaust systems for such "concours classics" as Rolls-Royce and Ferrari cars and have evolved into the premier manufacturer of today's performance vehicles for the street, off-road, and racing.

    BORLA is committed to providing world-class exhaust products which surpass the expectations of our customers. To that end, our facility is complete with a state-of-the art test and development center where we are continually improving our manufacturing efficiency and standards. We have pioneered a variety of improvements in the design of performance exhaust systems. Alex Borla currently holds several US patents for innovative exhaust system technology, and the company has won numerous "Best New Product" awards in the industry. Every BORLA Cat-Back system, Header and Rear Section is made from austenitic stainless steel (superior to 409 or aluminized steel) employing mandrel-bent tubing, all-welded construction, and is designed for accurate fit and easy installation. Over 30 years experience and special merge collector technology provide the ultimate in power and endurance.

    The performance advantages of a BORLA are widely recognized. The top engine builders in the racing world rely on BORLA exhaust for maximum performance. In fact, BORLA is at the forefront of the movement toward responsible racing with our full line of patented, award and race-winning racing mufflers that not only maintain a race engine's power, but in some instances actually add power. This technology is incorporated into BORLA exhaust for the street, providing 7-10% increased horsepower and torque when you plant your foot, and improved gas mileage at cruising speeds.

    General

    Tip Quantity
    0
    Outlet Position
    Rear
    WARNING CA Proposition 65
    Yes
    Body Width
    9.500 In.
    Overall Length
    19.000 In.
    Inlet Inside Diameter
    2.250 In.
    Outlet Outside Diameter
    2.250 In.
    Main Piping Diameter
    2.250 In.
    Shape
    Oval
    Muffler Count
    2
    Inlet Type
    Dual
    Inlet Position
    Front
    Body Length
    19.000 In.
    Inlet Outside Diameter
    2.250 In.
    Inlet Connection Type
    Pipe
    Outlet Type
    Dual Outlet

    Packaging

    length
    9.00
    width
    9.00
    height
    33.00
    weight
    12.00
    Information on technical characteristics, the delivery set, the country of manufacture and the appearance of the goods is for reference only and is based on the latest information available at the time of publication.
    1. bryce adams
      27 Feb, 2015
      I have an 04 gmc sierra 1500 with a 5.3 liter v8. I was worried that the sound would be too loud because the borla muffler is much smaller than the factory muffler, and the borla has a pretty much straight thru design. My exhaust pipe is 2 3/4 and this muffler is 3 inch, so after making my cuts there was a small gap to fill. I used two 6 inch long exhaust adapters which I could sleeve to any depth which made up for the shorter muffler size.after installing the new muffler, I was very satisfied with the sound. Its a nice deep low sound which doesn't drone out on the highway. I can listen to music on low volume and not even notice it. However, when I romp on it, it puts out this low tone, throaty, almost shredding noise yet it doesn't carry all over town and echo off of buildings like you see on other trucks.It provides that very traditional borla noise that I was hoping it would, and for the price I would definitely buy it again. This is my second borla product...
    2. Michael W. Martens
      21 Feb, 2015
      It's great! I seem to be running a bit behind with these. My bad.
    3. thomas j decoste
      20 Jan, 2015
      was what I expected
    4. Ryan H.
      06 Nov, 2014
      Great muffler! Just replaced the stock muffler on my 2013 Silverado 5.3L with this Borla muffler and left the rest of the exhaust stock...sounds AMAZING! Exactly what I was looking for...nice low, clean, mellow exhaust tone w/out any cackle or drone noise. Almost lulls you to sleep at cruise speed it sounds so good, but still gets the testosterone pumping and let's everyone know you're a man when you get on it! Great price and fast/free shipping from AutoPartsWAY as usual too!
    5. Roxy
      05 Nov, 2014
      Works great! Good quality!
    6. Frank C. "Frank Celaya"
      09 Jul, 2014
      We love the sound this muffler produces, For our truck it produces a nice low rumble when idling and is pretty calm when driving normal. Once you floor it, it produces a cool muscle car pitch that lets people know theres a borla here! we love it! Its not to expensive compared to other crap out there. So its money well spent.
    7. Garrett
      25 Jun, 2014
      Just got around to putting it on the other day. Has a clean, quiet, but still subtly loud sound to it. Much better than an N1 3" can in my opinion.
    8. Cristobal Moncada
      13 Mar, 2014
      Installed borla muffler on 04 jeep liberty limited 3.7L. Sounds great, not to load on the highway, definately satisfied with the end result
    9. Jacob S Frederick
      16 Jan, 2014
      Bought this for my 2013 6.2L Sierra. It sounds great when you stomp on it, but is fairly quiet at highway speeds. The install was a bit of a pain, but that is on GMC's end and their choice of pipe sizing.
    10. Brian G
      19 Dec, 2013
      Great sound! I had them installed on my S4 (4.2) and the change is dramatic. The sound and even throttle response has improved. The price/quality proposition can't be beat. I've had flow masters, dynomax and magnaflow on other cars and I'm happier with the Borlas.
    11. R. M.
      04 Nov, 2013
      Installed this on a '06 Ford F150 with the 5.4l. The sound on the outside is mild but noticeable and very aggressive when accelerating hard. It is slightly audible on the inside and has zero drone. A nice performance sound - deep and rich. Build quality is fantastic, of course - Borla quality is always very high.
    12. Joseph Larranaga
      26 Jul, 2013
      I bought this muffler to replace a flow master 40 series. The flow master 40 series is a great muffler but the only thing wrong with it for me was it made muffled sound at crusing speed on the freeway. It sounds great on acceleration but not at crusing speed. So I bought this borla muffler. Its not throaty as the flow master but you dont get that vibration in the cab like the flow master and it is just and little louder than stock and smooth you can feel the increase in pedal response. I put this muffler on a 2013 Chevy Silverado 4x4 crew cab 5.3 engine. If you like vibration and loud go with the flow master. If you want smooth and closer to stock sound go with this borla. I am not knocking Flow master cause they make a great product it is just a matter of preference.
    13. Michael Majowicz
      24 Jul, 2013
      My concern was loss of power thru the exhaust system, but did not want to exceed noise requirements. Easily accomplished with this solution.
    14. loosh94
      03 Jun, 2013
      I like the sound of this muffler on 6V fj 2013I made it costum by low price and perfict result, sport sound and good not that loud in 6v i like it
    15. shortround
      30 Dec, 2012
      raw stainless, good welds, little lighter than i expected(weight), nice deep tone, sound good when put your in it. little louder than I care for but I wouldn' t remove it.
    16. James Pen
      06 Apr, 2012
      Man dude this exhaust is great. I got 60 horse power from my dyno and the sound is crisp I love it. It was worth every penny.
    17. Zachary H. Moore "Just a guy"
      07 Oct, 2011
      I was a little worried it was going to be too loud on my Ford Ranger 3.0 V6 4x4 Automatic but it's quiet at idle and low RPMS. It is more aggressive sounding at higher RPMs (above 3500 RPMs) but that's to be expected with an aftermarket muffler.
    18. Philip
      24 Jun, 2011
      worth the price of admission! nice light weight construction over stock is a bonus too. r&r'd the ridiculous boat anchor of a stock muffler and much happier now, finally sounds and flows like a Hemi. no simple way to make duals w/o losing precious clearance so single it is (WK 4x4).
    19. piro
      17 Nov, 2010
      If you want a muffler for turbo or N/A applications and you have a car with a small amount of displacement this is what you want. It is a good, high-flowing muffler with a good exhaust note and won't completely kill your gas mileage, for those of you that are worried about it. This isn't something that is ridiculously loud either. Knowing a few people that have had Borla mufflers before buying mine, I know they will last and sound good doing it. Also with its Million Mile Warranty and Stainless Steel construction it is a pretty solid muffler.

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