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aFe POWER 48-43003-YN Twisted Steel Headers & Y-Pipe; Race Series Ford F-150 04-08 V8-5.4L

$1,921.25 Sale:$1,537.00


Model #48-43003-YN

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Shopper Award

This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles.

Purchasing this product requires you to sign our Vehicle Compliance Waiver here.

Factory Mounting Locations:

A direct bolt-on installation which requires no cutting or drilling to provide a hassle-free installation.

Formed Collectors: 4-to-1 formed collectors decrease turbulence and increases exhaust velocity. The result is increased horsepower, torque and improved throttle response.

Ball Socket Connections: Unique ball socket connections are used for an easier installation. The ball socket connections also requires no gaskets, giving you a leak-free seal.

Optimized Tube Lengths: Tube lengths are optimized for true pulse control technology which improves flow and performance.

Headers and Y-pipe sold as set, not available individually

aFe headers and exhaust are engineered and manufactured in their Corona, California manufacturing facility.

Note: This system does not come with catalytic converters and is not currently CARB exempt and is not available for sale in California or for use on any vehicle registered with the California Department of Motor Vehicle.


  • Twisted Steel Headers Features:
  • Constructed out of 1-5/8" 16-gauge stainless steel mandrel-bent tubing
  • Incorporates 4-to-1 formed collectors
  • Optimized tube lengths
  • Utilizes ball socket connections
  • Y-Pipe Features:
  • Constructed out of mandrel-bent stainless steel tubing
  • True 2 into 1 mitered merge collector eliminates dead zone for improved flow
  • Mandrel-bent 3" stainless steel tubing for better flow and added power
  • Test Results:
  • Added an astounding +17horsepower and +24lbs. x ft. of torque as verified by their in house dyno

Other Part Numbers:
AFE #afe48-43003-YN

Proposition 65

/!\ warningWARNING: Cancer and Reproductive Harm

Vehicle Engine Notes
Ford F-150

  • aFe warrants our products to be free from manufacturer's defects due to workmanship and materials.
  • The warranty period begins on the original invoice date and covers the applicable period listed below.
  • This warranty applies only to the original purchaser of the product and is non-transferrable.
  • Proof of purchase of the aFe product is required for all warranty claims.
  • Warranty is valid provided aFe instructions for installation and/or cleaning were properly followed.
  • Proper maintenance with regular inspections of product is required to insure warranty coverage.
  • Damage due to improper installation, abuse, unauthorized repair or alteration is not warranted.
  • Incidental or consequential damages or cost, including installation and removal of part, incurred due to failure of aFe product is not covered under this warranty.
  • All warranty is limited to the repair and/or replacement of the aFe product.
  • All products sold under aFe's Private Label Program do not carry an aFe warranty.
  • All items purchased labeled "Closeout" or "Overstock" are final sale. No returns will be accepted.
  • All items listed as "Race Only" are not covered by aFe's warranty.
  • Click Here for the list of products accepted

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