🔥 Elevate your ride with the BORLA ProXS – power, precision, and prestige in one sleek muffler!
The BORLA 40664 ProXS Muffler features a durable T-304 stainless steel construction with a reversible 2.25" offset inlet and center outlet design. Measuring 19" overall length with a 4" x 9.5" oval body, it offers universal fitment and is proudly made in the USA. Engineered for enhanced power, torque, and the distinctive BORLA sound, this muffler is a top choice for automotive enthusiasts seeking performance and style.
| Brand | Borla |
| Vehicle Service Type | Car |
| Shape | Oval |
| Inlet Connection Size | 2.25 Inches |
| UPC | 808422406642 |
| Manufacturer | BORLA |
| Global Trade Identification Number | 00808422406642 |
| OEM Part Number | 40664 |
| Model | Borla 40664 |
| Item Weight | 5 pounds |
| Country of Origin | USA |
| Item model number | 40664 |
| Is Discontinued By Manufacturer | No |
| Exterior | Painted |
| Manufacturer Part Number | 40664 |
R**S
Worth the money
Installed this on my 2003 Toyota Tacoma 4wd extra cab pickup with 3.4L engine...I was looking for a decent sound but not overly loud and this delivered perfectly...Seems to have improved throttle response after adding a cold air intake kit...Used stock pipe in front of muffler cut off from OEM exhaust and AP tailpipe with stainless steel band clamps...Installed in less than 30 minutes...Definitely would recommend!
S**E
Great on 3rd gen 4Runner
Went from a JLA? muffler (cant remember which one) to this on my s/c 3.4l 3rd gen 4Runner. It sounds great, nice deep sound without being too loud. The sound is way higher quality than I was expecting, to be honest. I just wanted something a bit quieter than what I had. At stop lights its so quiet and smooth inside the vehicle that I sometimes think my truck stalled for a quick second. But when you punch it, you get a mean sound that is not obnoxiously loud or cheap sounding.
G**H
Good sound.
Sounds good on my 96 3.4 Tacoma. Maybe should have went with the non xl model but still quality muffler.
H**.
Deep and not too loud
Hardly increased the volume. I measured the sound and it only increased the output by about 2 dB. However, mufflers do require break in and it will only get louder over time. It made the tone a lot deeper and makes me feel like I'm actually driving a car considering my car had no exhaust sound previously.
C**I
Good sounding muffler for a good price.
Installed on a 99 4runner, sounds pretty good without too much drone. Sounds much better than the 40 series flowmaster that was on my old one.
C**S
3rd gen 4runner 3.4L use the 40665 borla
Got this for my 2000 4runner 3.4L and it’s great. Only thing I was sort of bummed about is that I realized our stock exhaust system is 2.5” not 2.25” like this muffler.. I still installed it just fine with a couple reducers but it would’ve been waaaayyyyy easier with the 40665 borla.... sounds great, more ground clearance, weight savings.. can’t complain for 130$ish total it sure beats spending 6-800$ on a cat back exhaust system.
R**D
Just a bit louder then stock
If your looking for some just a bit louder than stock but with more of a deeper tone this is definitely for you. But this is definitely more quiet then the 14 inch body version. Installed on a 00 tacoma 3.4L
T**M
Good stuff
Petty good product for its price and performance
Trustpilot
2 months ago
1 month ago
