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- USA
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Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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Description
Pacemaker | Small Block Chev V8 283-400 | Holden HQ-WB 1 3/4" Tri-Y | PH5320 L/RPacemaker Chevrolet 283 400 Small Block V8 Holden HQ WB PH5320 L R Engineered for performance and durability, these Pacemaker Tri Y headers are designed to suit Holden HQ through WB models fitted with Small Block Chevrolet V8 engines ranging from 283 to 400 cubic inches. These headers provide excellent ground clearance and optimized exhaust scavenging for both street and strip applications. Note: Spacers must be fitted on the correct side; RH spacer
Pacemaker Chevrolet 283-400 Small Block V8 - Holden HQ-WB - PH5320 L/R
Engineered for performance and durability, these Pacemaker Tri-Y headers are designed to suit Holden HQ through WB models fitted with Small Block Chevrolet V8 engines ranging from 283 to 400 cubic inches. These headers provide excellent ground clearance and optimized exhaust scavenging for both street and strip applications. Note: Spacers must be fitted on the correct side; RH spacer is 1¾” high, LH spacer is 1¼” high.
Features:
This product offers the following high-performance features:
- Tri-Y Design: Specifically tuned to enhance mid-range torque and overall engine breathability.
- Transmission Compatibility: Precision fitment for Turbo 400 and Powerglide automatic transmissions.
- Heavy Duty Construction: Built to withstand the heat and vibration of high-displacement SBC V8 motors.
Product Specifications for PH5320 L/R
| Feature | Value | Feature | Value |
|---|---|---|---|
| Part # | PH 5320 | Gasket | DSF 9 |
| P/Steering | Yes | Primary Pipe | 1¾" (44mm) |
| Air Con | Yes | Secondary Pipe | 2" (51mm) |
| Oxy Sen | N/A | Outlet | 2¼" (57mm) |
| E.G.R | N/A | Y Branch | N/A |
| Fitting Time | 2 Hrs | Design | Tri-Y |
Important Notes:
- Will fit Turbo 400 and Powerglide automatic transmissions.
- Will not fit slant plug heads or raised port heads.
- Will only fit with original engine mounting spacers or PACEMAKER spacers (Part # Pemp 350).
- RH spacer must be 1¾” high; LH spacer must be 1¼” high.
Important Information
- The image shown may not reflect the actual product
- Shipping times may vary depending on destination and stock availability
Vehicle Applications:
Vehicle Applications for PH5320 L/R
| Make | Model | From | To | Body | Series | Engine | Variant | Drivetrain |
|---|---|---|---|---|---|---|---|---|
| HOLDEN | ||||||||
| HOLDEN | Kingswood / Belmont / Statesman / Monaro | 1971 | 1984 | Sedan / Ute / Wagon / Van / Coupe | HQ-HJ-HX-HZ-WB | Small Block Chev (283-400) | Manual & Automatic | RWD |
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:
- 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
4.2 ★★★★★
Based on 806 reviews
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Product Reviews
★★★★★ 5
Not too thick and durable and sturdy.
Color: Rustic Brown, Size: 24"W x 6.7"D, 3 Pack
Just before I purchased these 3 I bought 2 sets of 2 larger ones. The color is exactly what I was needing. They are packaged together so no scratches or damage. My husband (the installer) says they are easy enough to install.
They are perfect for a diy update, durable and hold plenty of weight for their size. Happy happy customer
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Good quality for the price
Color: Black, Size: 30"W x 6.7"D, 3 Pack, Color: Black, Size: 30"W x 6.7"D, 3 Pack
Seamless floating shelves that look and feel great. I opted to use different drywall anchors since I didn't trust the ones that came with the product. I have bad drywall and no studs where I was mounting so that doesn't fall back onto the product. The shelves are true to size and have held up great. The shelves themselves aren't too heavy so it leaves some room to add weight onto them. I used the 30in long shelf on the left and 24in long shelf on the right to create a nice corner shelf. There are additional screws on the bottom the keep the shelves from moving off the bracket.
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Reviewed in the United States on February 18, 2026
★★★★★ 3
Be careful
Color: Oak, Size: 24"W x 6.7"D, 3 Pack, Color: Oak, Size: 24"W x 6.7"D, 3 Pack
They are nice but flimsy, not flush on the wall scared they might fall
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Reviewed in the United States on January 27, 2026
★★★★★ 4
Beautiful for decor, not great for anything with heft.
Color: Oak, Size: 24"W x 6.7"D, 3 Pack, Color: Oak, Size: 24"W x 6.7"D, 3 Pack
They are easy to install and exactly as pictured. I find them to be lovely and uniform, and they can't with proper instructions and even extra pieces. I took away a star because they are described as "heavy duty" use, but the dowels used to mount the shelves are flimsy. Mine are mounted on combo of studs and drywall, the plates are secure and not going anywhere. The problem is the dowels themselves that fit into the corresponding holes of the shelf: they bend easily. I put three books and bookends on one shelf and watched it tip down. I did attach the bottom screws into the dowels I secure the shelf to the mounting brackets, but that's not going to save any items from sliding off as it bends down over time. I pulled the books immediately and decided to use these for decor only rather than any practical use. The stock photo suggesting lining these shelves with glass jars filled with flour, rice, and lentils is a terrible idea.
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Reviewed in the United States on August 12, 2025
★★★★★ 5
Great Looking Shelves
Color: Oak, Size: 24"W x 6.7"D, 3 Pack
We love the floating shelves. They were easy to install and matched our island perfectly.
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Reviewed in the United States on February 27, 2026