SKU: 48329273917

Pacemaker | 1⅝" Tri-Y Performance Headers | HSV AWD Coupe 4, Avalanche & XUV 5.7L | PH5366 L/R HSV Kit

Sale price$497.24 Regular price$552.49
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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17

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Description

Pacemaker | 1⅝" Tri-Y Performance Headers | HSV AWD Coupe 4, Avalanche & XUV 5.7L | PH5366 L/R HSV KitPacemaker Tri Y Performance Headers HSV VY VZ AWD Coupe 4, Avalanche & Avalanche XUV 5. 7L Gen III PH5366 L R HSV Kit Unlock the performance potential of your All Wheel Drive HSV with the Pacemaker PH 5366 Tri Y Performance Headers. Specifically engineered for the unique chassis requirements of the AWD Coupe 4, Avalanche Wagon, and Avalanche XUV Ute, these headers provide a significant upgrade over factory manifolds. The Tri Y design is precision

Pacemaker Tri-Y Performance Headers - HSV VY-VZ AWD Coupe 4, Avalanche & Avalanche XUV 5.7L Gen III - PH5366 L/R HSV Kit

Unlock the performance potential of your All-Wheel Drive HSV with the Pacemaker PH 5366 Tri-Y Performance Headers. Specifically engineered for the unique chassis requirements of the AWD Coupe 4, Avalanche Wagon, and Avalanche XUV Ute, these headers provide a significant upgrade over factory manifolds. The Tri-Y design is precision-tuned to maximize exhaust scavenging, enhancing the torque and power delivery of the 5.7 Litre Gen III engine. Constructed with 1⅝" (41mm) primary pipes and 1⅞" (48mm) secondaries, this kit ensures optimal exhaust flow while maintaining essential clearances for power steering and air conditioning systems. Designed for automatic transmission models, these headers offer the high-quality, bolt-on performance Pacemaker is known for.

Features:

This product offers the following performance features:

  • AWD Optimized: Custom-designed specifically for the HSV All-Wheel Drive (AWD) chassis.
  • Tri-Y Design: Pulse-matched design to increase low-to-mid range torque, ideal for heavy-duty performance and daily driving.
  • Premium Construction: Mandrel-bent 1⅝" (41mm) primary and 1⅞" (48mm) secondary pipes for superior exhaust velocity.
  • High-Flow Outlet: Features a 2½" (63mm) outlet to support increased power levels.
  • System Compatibility: Fully compatible with Power Steering and Air Conditioning systems.
  • Precision Engineering: Designed to fit HSV VY and VZ models with the 5.7L Gen III engine and automatic transmission.
Product Specifications for PH 5366
Feature Value Feature Value
Part # PH 5366 Gasket DSF 138
Primary Pipe 1⅝" (41mm) Secondary Pipe 1⅞" (48mm)
Outlet 2½" (63mm) Oxy Sensor Yes
P/Steering Yes Fitting Time 3 Hrs

Important Notes:

  • Wiring Extensions: Models VY Series II and VZ require Oxygen Sensor Wiring Loom Extensions (VY Series II: PEX5367Y x 1; VZ 5.7L: PEX5367Z x 1).
  • Transmission: Specifically designed for Automatic transmission models.

Important Information

  • The image shown may not reflect the actual product
  • Shipping times may vary depending on destination and stock availability

Vehicle Applications:

Make Model From To Body Series Engine Variant Drivetrain
HSV Coupe 4 / Avalanche / Avalanche XUV 2003 2006 Coupe / Wagon / Ute VY - VZ 5.7L Gen III V8 Automatic AWD
Warranty Information
Product Warranty Period
Pacemaker Headers Two (2) years.
Pacemaker King Brown 4x4 Exhaust systems Five (5) years.
Pacemaker Sports exhaust systems Five (5) years.
Fabrication products and accessories One (1) year.

Payment & Security:
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

 

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Pacemaker Tri-Y Performance Headers - HSV VY-VZ AWD Coupe 4 / Avalanche / XUV 5.7L V8 - PH 5366 L/R HSV Kit

Unlock the performance potential of your All-Wheel Drive HSV with the Pacemaker PH 5366 Tri-Y Performance Headers. Engineered specifically for the rare AWD HSV line-up, including the VY-VZ Coupe 4, Avalanche wagon, and Avalanche XUV ute, these headers are designed to clear the complex AWD drivetrain while providing substantial gains in power and torque. The Tri-Y design focuses on optimizing exhaust scavenging for the 5.7 Litre Gen III LS1 engine, ensuring improved throttle response and a deep, aggressive V8 note. Built with mandrel-bent 1⅝" (41mm) primary pipes and 1⅞" (48mm) secondaries, these headers provide the high-flow efficiency needed for both street performance and heavy-duty use. Proudly Australian-made, this kit is specifically tailored for automatic transmission models.

Features:

This product offers the following performance features:

  • AWD Specific Engineering: Custom-designed to fit the unique chassis and drivetrain of HSV All-Wheel Drive models.
  • Tri-Y Scavenging: Optimized pipe routing to maximize mid-range torque and horsepower.
  • High-Flow Construction: 1⅝" (41mm) primaries and 1⅞" (48mm) secondaries ensure smooth, unrestricted exhaust velocity.
  • LS1 V8 Performance: Specifically tuned for the 5.7 Litre Gen III engine for optimal efficiency.
  • Full Accessory Clearance: Maintains complete clearance for Power Steering and Air Conditioning systems.
  • Precision Fitting: Designed for a high-quality fit on HSV VY and VZ AWD series.
Product Specifications for PH 5366
Feature Value Feature Value
Part # PH 5366 Gasket DSF 138
Primary Pipe 1⅝" (41mm) Secondary Pipe 1⅞" (48mm)
Outlet 2½" (63mm) Oxy Sensor Yes
P/Steering Yes Fitting Time 3 Hrs

Important Notes:

  • Wiring Extensions: Models VY Series II and VZ require Oxygen Sensor Wiring Loom Extensions.
  • VY Series II: Requires Part No PEX5367Y x 1.
  • VZ 5.7Ltr: Requires Part No PEX5367Z x 1.
  • Transmission: Specifically designed for Automatic models.

Important Information

  • The image shown may not reflect the actual product
  • Shipping times may vary depending on destination and stock availability

Vehicle Applications:

Make Model From To Body Series Engine Variant Drivetrain
HSV Coupe 4 / Avalanche / Avalanche XUV 2003 2006 Coupe / Wagon / Ute VY - VZ 5.7L Gen III LS1 Automatic AWD
Warranty Information
Product Warranty Period
Pacemaker Headers Two (2) years.
Pacemaker King Brown 4x4 Exhaust systems Five (5) years.
Pacemaker Sports exhaust systems Five (5) years.
Fabrication products and accessories One (1) year.

Payment & Security:
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 48329273917

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4.6 ★★★★★
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Verified Purchase
Amazon Customer
Lake Worth, US
★★★★★ 4
Soft "cooling" case.
Yes it is very cool when you lay on it. It doesn't stay cold though. Within a minute or 2 to whatever your temp is.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 25, 2025
C
Verified Purchase
CountryGal
Battle Creek, US
★★★★★ 5
Great for hair and skin. Great buy.
These pillow cases are great for my hair and skin. They look good, hold up well in the washer and dryer, and the price is great. They are cooling. Of course I wish they could be more cooling, but honestly I'm not sure that's even possible. Great pillow cases. Already bought more for other heads. Would buy again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
M
Verified Purchase
Melissa
Massapequa, US
★★★★★ 1
Hot hot hot. Side sleepers will hate it
At first touch, these are the coldest pillowcases I own … but only for seconds. Once you actually lay on them, within seconds they adjust to your body temp, the heat feels trapped, my head begins to feel hotter than before I laid down - which has in turn caused me loathe these pillow cases. I hate that I have missed the return window. Would never buy again, would never recommend. My satin ones aren’t even this hot! I gave them the good ole 30-day try. Side sleepers - if you are like me and sleep on your side with arm tucked under pillow - flipping this pillow over in hopes of a cold side - forget it, it’s already hot from your arm.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 29, 2025
T
Verified Purchase
Trevor Barton
Battle Creek, US
★★★★★ 2
Ehh
Pills up rather quickly
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Reviewed in the United States on June 7, 2026
D
Verified Purchase
Dorothy Gilbertson
Lexington, US
★★★★★ 3
Nice but dissapointing
So it sometimes stays cool but if it’s under a blanket and you have your body on it at all it will get warm but the spots you don’t use will get cool sometimes. I am very disappointed in the material though because it’s like my dry skin scratched the pillow case all over which makes me question it and I don’t think I would buy again.
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Reviewed in the United States on December 15, 2025

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