Long Tube Headers + Y-Pipe for 1999–2006 Chevy GMC Silverado Sierra 1500 GMT800 | 4.8L 5.3L 6.0L | Stainless Exhaust Manifold Kit

Long Tube Headers + Y-Pipe for 1999–2006 Chevy GMC Silverado Sierra 1500 GMT800 | 4.8L 5.3L 6.0L | Stainless Exhaust Manifold Kit

Boost your truck’s performance with this Long Tube Exhaust Header and Y-Pipe Kit, engineered for 1999–2006 Chevy and GMC Silverado/Sierra 1500 GMT800 models equipped with 4.8L, 5.3L, or 6.0L V8 engines. This high-flow header system replaces the restrictive factory manifolds, delivering improved exhaust flow, increased horsepower, and better throttle response.

Constructed from T304 stainless steel, the headers feature a three-stage polished finish for enhanced durability and corrosion resistance. The 3/8” laser-cut head flanges ensure a tight, secure seal to prevent leaks, while TIG-welded joints provide added strength to resist cracking under high heat and pressure.

This system also includes a precision-engineered Y-pipe, designed to merge exhaust gases smoothly and efficiently from both headers into a single outlet—ideal for better scavenging and optimal flow. A black thermal coating provides additional rust resistance and long-term reliability.

Key Features:

• Vehicle Fitment:
  Compatible with 1999–2006 Chevy Silverado 1500 / GMC Sierra 1500 GMT800
  Supports 4.8L, 5.3L, and 6.0L V8 engines (2WD & 4WD*)
  *Note: 4WD models may require minor trimming for clearance

• High-Quality Construction:

  • Material: T304 stainless steel

  • Surface Finish: 3-stage polish + black thermal coating

  • Header Inlet: 1.75" | Outlet: 3"

  • Laser-cut 3/8" flanges for a perfect seal

  • TIG-welded joints for durability and crack resistance

• Performance Boost:

  • Long tube design for maximum exhaust flow

  • Improves horsepower, torque, and throttle response

  • Y-pipe included for efficient exhaust gas merge

Fitment Notes:

• Transmission Clearance: If using a 4L80E transmission, minor trimming of the bellhousing ears may be required for proper fitment.

• Early 2500 Series Models: May have compatibility issues due to frame design differences from previous generations.

Package Includes:

• 1 x Pair of Long Tube Headers

• 1 x Y-Pipe

• Gaskets, Bolts, and Head Gaskets included for installation

In a hurry to get your order? Not a problem at all here at Moto Life! After three to five business days, you should get your order. Please refer to our shipping page if you have any more questions or issues about shipment.

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