

🔥 Elevate your ride with Borla’s ProXS – power, precision, and presence!
The BORLA 40348 ProXS Muffler is a 19" long, 4" x 9.5" oval, universal exhaust upgrade featuring a 2.5" center inlet and dual 2.5" outlets. Constructed from durable T-304 stainless steel with a reversible design, it offers superior exhaust flow, enhanced horsepower, and improved fuel efficiency. Engineered for easy installation and corrosion resistance, this muffler delivers an aggressive yet refined sound profile, making it a top choice for performance enthusiasts seeking quality and versatility.
| ASIN | B0018JIZF4 |
| Best Sellers Rank | #526,698 in Automotive ( See Top 100 in Automotive ) #186 in Automotive Performance Exhaust Mufflers #10,575 in Automotive Emission & Exhaust Products |
| Brand | Borla |
| Customer Reviews | 4.4 4.4 out of 5 stars (191) |
| Date First Available | May 3, 2007 |
| Global Trade Identification Number | 00808422403481 |
| Inlet Connection Size | 2.5 Inches |
| Is Discontinued By Manufacturer | No |
| Item Weight | 10 pounds |
| Item model number | 40348 |
| Manufacturer | BORLA |
| Manufacturer Part Number | 40348 |
| OEM Part Number | BDLS40348 |
| Shape | Oval |
| UPC | 808422403481 |
| Vehicle Service Type | Car |
S**R
Your neighbors will love you again...
I had a flowmaster for many years on my 2005 Silverado Z71. It sounded pretty good until I put shorty headers, trick flow heads and a cam in it and it just turned obnoxious. I kept reading how this Borla muffler was a little quieter while still having an aggressive sound when accelerating. The price was right so I pulled the trigger. This muffler is freakin awesome! The tone is fantastic and my neighbors love me again. For me it was all the good reviews come to life. Very happy with my purchase.
B**W
Great muffler made my truck sound better
Bought this to replace two small glass packs the previous owner had put on my truck. The glass packs were load and sounded horrible. This muffler sounds fantastic with a low rumble. It is not loud on start up and when driving at low RPM's on the highway. An added bonus is it does get loud when you romp on it. It is a well build muffler and great for the price.
D**.
Great sound
Awesome unique sound on a hemi. Great low end pressure and quiet on idle. Sounds mean when you really hit the gas but not obnoxious. Definitely worth every penny. If you have a ram , get rid of the resonators and add new exhaust tips. You’ll thank me.
M**E
Sounds extremely good. Not loud at idle or start up and ...
Sounds extremely good. Not loud at idle or start up and has a really deep throaty tone when cruising. But when you put the pedal down it screams v8 and when you let off after full throttle it sounds really really good. Buyer beware tho, the muffler is made from aluminum and cannot be welded to steel exhaust piping. Currently running dumped at the muffler until a solution is figured out
B**H
slightly louder than stock
I put this on a stock 2012 Nissan Titan. It's not as loud as I thought it'd be. I'd seen videos and read forums that lead me to believe it would be much louder than it is. I'm hoping as it gets a few miles on it it will get louder. Not totally dissapointed but not quite what I was expecting either.
R**N
The perfect sound
Sounds awesome! as expected. Subtle at idle and the perfect amount of aggressive at full throttle. Been using Borla for years and they’re still some of the best sounding mufflers around.
B**N
Great quality, sound
Great quality, sound,and value. There is considerable drone at certain RPMs in my application i.e. 2003 Silverado 1500 HD crew cab 6.0 litre
A**S
Nice and quiet
Sounds great
W**T
Put this on an FJ cruiser 4.0 v6, and yeah it’s fine, little stony on the highway Ngl… makes me wanna soundproof althought maybe it’s gotten better w some miles… it’s not that bad tho and perfect volume in town… but highway… ehhhh
A**L
lo compre por solo 1,500 pesos, a mitad de lo que cuesta normalmente. Borla es sinónimo de calidad. lo compre para un sentra SE-R Spec V, y estoy encantado no es tan ruidoso y quedo a la perfección lo recomiendo 100% el paquete llego al cuarto dia de compra, muy bien por amazon.
C**S
Très beau produit et très bon service après vente ! Je le recommande !
Trustpilot
1 month ago
1 month ago