Holden HQ HJ HX HZ 44.5mm Tuned length HEADERS

Part specs

SKU

PH5225

Supplier

MPI Automotive

Category

Extractors and headers

RRP

$1656.82 AUD

Brand

MPI Automotive

Vehicle fitment

HOLDEN

Stock status

IN_STOCK

Source ID

MPI_PH5225

Workshop note

Buy Holden HQ HJ HX HZ 44.5mm Tuned length HEADERS by MPI Automotive — MPI Automotive Product Overview Looking to unlock the full potential of your HOLDEN? The Holden HQ HJ HX HZ 44.5mm Tuned length HEADERS is engineered to deliver the performance, sound, and reliability that enthusiasts demand. Manufactured by MPI Automotive and available through MPI Automotive, the Holden HQ HJ HX HZ 44.5mm Tuned length HEADERS represents the gold standard in aftermarket exhaust technology. Every component — from the CNC•machined flanges to the internally baffled mufflers — is engineered to reduce backpressure, improve exhaust gas velocity, and deliver a measurable increase in both power and torque. Key Features & Benefits • CNC•machined flanges and precision TIG welding for leak•free, factory•like fitment • Dyno•proven power and torque gains across the entire RPM range • Full bolt•on design — no cutting, welding, or fabrication required for installation • Backed by MPI Automotive's Australian warranty and nationwide support network Vehicle Fitment & Installation Designed as a direct replacement for the HOLDEN, the Holden HQ HJ HX HZ 44.5mm Tuned length HEADERS uses all OEM mounting locations and includes every bracket, gasket, and clamp needed for a straightforward installation. Professional installation is recommended but experienced home mechanics can complete the job in 2•4 hours on a hoist. Performance Benefits The performance gains from the Holden HQ HJ HX HZ 44.5mm Tuned length HEADERS aren't just numbers on a dyno sheet — you'll feel the difference every time you accelerate. Reduced backpressure means your engine breathes easier, spools turbos faster, and delivers throttle response that puts a smile on your face. Combined with the weight savings over factory steel exhausts, this upgrade transforms how your HOLDEN drives. Compatible Vehicles This part is designed for fitment on: HOLDEN. Supplier Information The Holden HQ HJ HX HZ 44.5mm Tuned length HEADERS is sourced from MPI Automotive (mpiautomotive.com), one of Australia's leading automotive parts distributors. Every unit is backed by MPI Automotive's warranty and supported by their nationwide dealer network. SKU: PH5225 | RRP: $1,656.82 AUD | Available from MPI Automotive. Where to Buy Get your Holden HQ HJ HX HZ 44.5mm Tuned length HEADERS today from MPI Automotive. Priced at $1,656.82 RRP with fast Australian shipping and full warranty coverage. Whether you're building a weekend warrior or upgrading your daily driver, this is the exhaust system that delivers.