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Twisted Steel Long Tube Header & Y-Pipe 409 Stainless Steel w/ Cat

GM Silverado/Sierra 1500 09-13 V8-4.8L/5.3L
Part Number: 48-44006-YC

MSRP: $2,724.75


  • Constructed out of 16-gauge, 1-3/4 IN mandrel-bent stainless steel tubing for unrestricted flow
  • Incorporates 3/8 IN thick, laser-cut, head flanges designed to match the head port for a leak-free seal
  • 4-to-1 formed merge collectors eliminate flow blocking turbulence
  • Optimized tube lengths improve flow and performance
  • 100% hand MIG-welded construction ensures optimal strength and durability

Y-Pipe Features:

  • Constructed out of mandrel-bent stainless steel tubing
  • True 2-to-1 mitered merge collector eliminates dead zone for improved flow
  • Mandrel-bent 3 IN into 3-1/2 IN stainless steel tubing for better flow and added power
  • Incorporates high-Flow, 400 cell catalytic converters for improved flow

Test Results:

  • Added an astounding +32 HP and +39 lbs. x ft. of TQ
Read More

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

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

3/8 IN Laser-Cut Flanges:
These headers come with 3/8 IN thick laser-cut head flanges and gaskets that are designed to match the head port for a leak-free seal.

Dual High Flow Catalytic Converters:
This system utilizes 400 CPSI (cell per square inch) catalytic converters are used for maximum flow.

Constructed of mandrel-bent dual 3 IN stainless steel piping which transitions into single 3-1/2 IN piping to reduce back pressure and improve flow

True Merge Collectors:
Eliminates dead space that can cause turbulence and hinder flow.

Leak-Free Seal:
High quality OE style flanges and band clamps are used for a complete 360 degree sealing surface.

Hassle-Free Installation:
The performance header and y-pipe are designed to fit in the stock location incorporating the OE hangers, flanges and O2 sensor locations.

Race Disclaimer:
This is a Race Only product that is to be used solely for competition, it cannot be used on vehicles that are operated on public streets, roads or highways. Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, could be in violation of local, state and federal laws. To complete the purchase of this item, aFe POWER competition acknowledgement/liability release form must be filled out and submitted.

All aFe POWER headers and Y-pipes are engineered and manufactured in our Corona, California manufacturing facility.


Vehicle Applications

Year Make Model SubModel Engine Fuel
2009-2013Chevrolet Silverado 1500 V8 4.8L
2009-2013Chevrolet Silverado 1500 V8 5.3L
2009-2013GMC Sierra 1500 V8 4.8L
2009-2013GMC Sierra 1500 V8 5.3L
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MSRP: $2,724.75

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