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4 Inches/4 Inches Exhaust Muffler 4 Inches/4 Inches
4 Inches/4 Inches Exhaust Muffler On Sale
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Flowmaster Pro Series Laminar Flow Mufflers
Flowmaster Exhaust Pro Series MufflerFrom $285.95
- Most versatile Laminar Flow muffler we offer
- Deeper tone for great performance sound
- 409S Stainless Steel construction
- Limited lifetime warranty to original purchaser
- Low exterior heat via Cool Shell technology
- Both full-size and shorty version available
- California Residents: WARNING
From $285.95
Dynomax Exhaust Ultra Flo Welded Universal Muffler
Dynomax Exhaust Ultra Flo Welded Universal MufflerFrom $107.99
- Universal
- Stainless steel
- California Residents: WARNING
From $107.99
5.0
5.0
(2)
Banks Power Monster Exhaust Mufflers
Banks Power Monster MufflerFrom $319.00
- Type Of Muffler: Straight Through
- Inlet Tube Size: 2.5in.
- Outlet Tube Size: 2.5in.
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Oval
- California Residents: WARNING
From $319.00
3.7
3.7
(18)
MBRP High Flow Muffler Assembly
MBRP High Flow Muffler AssemblyFrom $255.74
- These Mufflers are designed to provide you maximum performance with minimum sound.
- California Residents: WARNING
From $255.74
5.0
5.0
(1)
Corsa Performance Exhaust dB Series Diesel Muffler
Corsa Performance Exhaust dB Series Diesel MufflerFrom $519.99
- Type Of Muffler: Straight Through
- Inlet Tube Size: 4.02 in.
- Outlet Tube Size: 4 in.
- Muffler Material: Stainless Steel
- California Residents: WARNING
From $519.99
11 Products
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Dynomax Ultra-Flo Welded Muffler - 17537
- Fitment: Universal Fit
- Type Of Muffler: Straight Through
- Inlet Location: Center
- Outlet Location: Center
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
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$137.99
$179.66
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$137.99
$179.66
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- Fitment: Universal Fit
- Type Of Muffler: Straight Through
- Inlet Location: Center
- Outlet Location: Center
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
SHOP 4WP's HUGE SELECTION
4WP PROTECTION PLAN
Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!
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Dynomax Ultra-Flo Welded Muffler - 17557
- Fitment: Universal Fit
- Type Of Muffler: Straight Through
- Inlet Location: Side
- Outlet Location: Side
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Body Diameter: 8 1/4 x 11 1/2
- Muffler Shape: Oval
- California Residents: WARNING + View More Specs - View Less Specs
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$156.99
$204.05
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$156.99
$204.05
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- Fitment: Universal Fit
- Type Of Muffler: Straight Through
- Inlet Location: Side
- Outlet Location: Side
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Body Diameter: 8 1/4 x 11 1/2
- Muffler Shape: Oval
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
SHOP 4WP's HUGE SELECTION
4WP PROTECTION PLAN
Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!
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Dynomax Ultra-Flo Welded Muffler - 21172
- Fitment: Universal Fit
- Type Of Muffler: Straight Through
- Inlet Location: Center
- Outlet Location: Center
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
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We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
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Qualifies for Free Shipping
$107.99
$134.38
On Backorder
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$107.99
$134.38
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- Fitment: Universal Fit
- Type Of Muffler: Straight Through
- Inlet Location: Center
- Outlet Location: Center
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
SHOP 4WP's HUGE SELECTION
4WP PROTECTION PLAN
Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!
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Dynomax Ultra-Flo Welded Muffler - 22572
- Fitment: Universal Fit
- Type Of Muffler: Straight Through
- Inlet Location: Center
- Outlet Location: Center
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
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Qualifies for Free Shipping
$142.99
$158.21
On Backorder
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$142.99
$158.21
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- Fitment: Universal Fit
- Type Of Muffler: Straight Through
- Inlet Location: Center
- Outlet Location: Center
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
SHOP 4WP's HUGE SELECTION
4WP PROTECTION PLAN
Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!
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MBRP High Flow Muffler Assembly - MK96116
How to Get it
Free! Curbside & In-Store Pickup: Select A Store Near You
Ship to Home:
Only 4 left in Stock ?- Fitment: Universal Fit
- Type Of Muffler: Straight Through
- Inlet Tube Size: 4 inch
- Outlet Tube Size: 4 inch
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Aluminized
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Length: 30 inch
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
Qualifies for Free Shipping
$255.74
$339.69
Only 4 left in Stock ?
$255.74
$339.69
Only 4 left in Stock
?
LOW PRICE GUARANTEE
EASY RETURNS
How to Get it
Free! Curbside & In-Store Pickup: Select A Store Near You
Ship to Home:
Only 4 left in Stock ?- Fitment: Universal Fit
- Type Of Muffler: Straight Through
- Inlet Tube Size: 4 inch
- Outlet Tube Size: 4 inch
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Aluminized
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Length: 30 inch
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
4WP PROTECTION PLAN
Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!
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Banks Power Monster Muffler - 53274
- Fitment: Universal Fit
- Monster Muffler
- Type Of Muffler: Straight Through
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
Qualifies for Free Shipping
$359.00
$398.89
On Backorder
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$359.00
$398.89
On Backorder
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- Fitment: Universal Fit
- Monster Muffler
- Type Of Muffler: Straight Through
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
4WP PROTECTION PLAN
Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!
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Reset Password
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Enter email address to change your password
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Banks Power Monster Muffler - 53509
- Fitment: Universal Fit
- Monster Muffler
- Type Of Muffler: Straight Through
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
Qualifies for Free Shipping
$319.00
$354.44
On Backorder
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$319.00
$354.44
On Backorder
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- Fitment: Universal Fit
- Monster Muffler
- Type Of Muffler: Straight Through
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
4WP PROTECTION PLAN
Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!
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Banks Power Monster Muffler - 53510
- Fitment: Universal Fit
- Monster Muffler
- Type Of Muffler: Straight Through
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
Qualifies for Free Shipping
$319.00
$354.44
On Backorder
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$319.00
$354.44
On Backorder
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- Fitment: Universal Fit
- Monster Muffler
- Type Of Muffler: Straight Through
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
4WP PROTECTION PLAN
Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!
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Flowmaster Pro Series Muffler - 14020100
- Fitment: Universal Fit
- Pro Series Muffler
- Aluminized
- California Residents: WARNING
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
Qualifies for Free Shipping
$285.95
$307.00
On Backorder
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$285.95
$307.00
On Backorder
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- Fitment: Universal Fit
- Pro Series Muffler
- Aluminized
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
4WP PROTECTION PLAN
Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!
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Corsa dB Series Diesel Muffler - 8004000
- Fitment: Universal Fit
- Corsa dB Series Diesel Muffler
- Type Of Muffler: Straight Through
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
Qualifies for Free Shipping
$519.99
$572.00
On Backorder
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$519.99
$572.00
On Backorder
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Email me when this product comes in stock
LOW PRICE GUARANTEE
EASY RETURNS
- Fitment: Universal Fit
- Corsa dB Series Diesel Muffler
- Type Of Muffler: Straight Through
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
4WP PROTECTION PLAN
Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!
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Reset Password
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Enter email address to change your password
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Corsa dB Series Diesel Muffler - 8004002
- Fitment: Universal Fit
- Corsa dB Series Diesel Muffler
- Type Of Muffler: Straight Through
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
Qualifies for Free Shipping
$519.99
$572.00
On Backorder
Contact Us for Availability or Alternatives
LOW PRICE GUARANTEE
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Email me when this product comes in stock
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$519.99
$572.00
On Backorder
Contact Us for Availability or Alternatives
Email me when this product comes in stock
LOW PRICE GUARANTEE
EASY RETURNS
- Fitment: Universal Fit
- Corsa dB Series Diesel Muffler
- Type Of Muffler: Straight Through
- Inlet Location: Centered
- Outlet Location: Centered
- Muffler Material: Stainless Steel
- Number of Inlets: 1
- Number of Outlets: 1
- Muffler Shape: Round
- California Residents: WARNING + View More Specs - View Less Specs
PROMOTIONS AUTOMATICALLY APPLIED
We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!
Lowest Price! Guaranteed! Request A Price Match
