Pacemaker Tri-Y Performance Headers - Holden HQ-WB Small Block Chev V8 - PH5310 L/R

Upgrade the performance of your classic Holden HQ through WB series with the Pacemaker PH 5310 Tri-Y headers. Specifically designed for Small Block Chevrolet V8 conversions (ranging from 283 to 400 cubic inches), these headers are the industry standard for fitment and flow. The Tri-Y design is engineered to deliver a significant increase in low-to-mid range torque, making it perfect for street performance and cruisers. Constructed with 1⅝" (41mm) primary pipes and 2" (51mm) secondaries, these headers provide the ideal balance of exhaust gas velocity and volume. Proudly Australian-made, they ensure high-quality mandrel-bent durability for your SBC-powered Holden.

Features:

This product offers the following performance features:

• Tri-Y Design: Optimized for a broad power band and improved mid-range torque.
• Versatile SBC Fitment: Compatible with 283, 302, 305, 307, 327, 350, and 400 Small Block Chev engines.
• High-Quality Piping: Mandrel-bent 1⅝" (41mm) primary pipes for smooth exhaust flow.
• Compact Outlet: 2¼" (57mm) outlet designed for efficient scavenging and easy integration into performance exhaust systems.
• Accessories: Fully compatible with Power Steering and Air Conditioning.

Important Notes:

• Transmission: Will fit Turbo 400 and Powerglide automatic transmissions.
• Head Compatibility: Will NOT fit slant plug heads (Part No. PH5315 required) or raised port heads.
• Mounting: Must be used with original engine mounting spacers or Pacemaker spacers (Part # PEMP 350). Note: Spacers are side-specific (RH: 1¾” high, LH: 1¼” high).

Important Information

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

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