Shopping Cart

Your cart is empty.

Your cart is empty.

BORLA 40670 ProXS ProXS Muffler 3' Center Inlet/ 2.25' Dual Outlet, 4' x 9.5' Oval, 19' Long Body, 25' Overall Length. Universal Part. Reversible Design.

Free shipping on orders over $29.99

$167.99

$ 81 .99 $81.99

In Stock

About this item

  • T-304 Stainless Steel
  • Universal Muffler
  • Reversible Design
  • Made In USA
  • Un-Notched necks are designed for weld in installation. If clamping, use band clamps 18003 & 18006.



Charles H GentryII
Reviewed in the United States on February 4, 2024
Nice muffler can see all the way through it, no restriction at all. Thought it would be louder but with 3 catalytic converters on a 3.5 2017 Tacoma not as loud as I would have liked but still nice sound and don’t have any dash lights coming on so far happy with it. May get some tips that are bigger to give a deeper sound but still not found any that sounds like I would want them.
Customer
Reviewed in the United States on July 4, 2020
Gives Chevrolet Silverado a good sound
D. L. GARDNER
Reviewed in the United States on October 18, 2020
Replaced factory muffler on a 2014 RAM 1500, 5.7 hemi. Nice deep rumbling cold start.. Not overly loud at idle or up to 1200 rpm. Deeper and more "buttery" than stock.. At full throttle it's a beautiful howl. No rasp. Cruising at 45 - 60 mph it's almost silent in the cab but at a sustained 1500-2000rpm / 70-75mph there is a drone. Not so much that you couldn't hold a conversation but it's noticable. It is a flow thru, reversible muffler so you have to weigh the power with the noise..
Patrick and Jennifer
Reviewed in the United States on September 1, 2017
Used as 2 in 1 out on 99 suburban, no cats, sounds great. Always a fan of borla, got a better sound then flowmaster for sure
Michael W. Martens
Reviewed in the United States on February 22, 2015
It's great! I seem to be running a bit behind with these. My bad.
justinbass1993
Reviewed in the United States on November 29, 2015
Sounds pretty good. I put this on my Yukon which has the 5.3 and sounds good. At a warm idle it gets quiet but that will happen since it not pushing a bunch exhaust out like a built big block would but if you want to add more lower end tone to you vehical this is worth the money
paul Wilburn
Reviewed in the United States on May 9, 2014
Wasn't a very good buy.wasted my money and time. going to sell it as soon as I get it off
James Pen
Reviewed in the United States on April 6, 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.
Recommended Products

$46.92

$ 20 .99 $20.99

4.6
Select Option

$376.49

$ 99 .00 $99.00

4.9
Select Option

$203.33

$ 99 .00 $99.00

4.4
Select Option

$108.78

$ 43 .99 $43.99

4.9
Select Option