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Description
Pacemaker | 1 3/4" Tri-Y Competition Headers | Holden HQ-WB 304-355 5.0L EFI Conv | PH5275 L/RPacemaker 1 3 4" Competition Tri Y Headers Holden HQ WB 304 355 5. 0L EFI PH5275 L R Maximize the performance of your EFI converted classic Holden with these premium Pacemaker Competition Tri Y headers. Specifically designed for HQ through WB models fitted with a 5 Litre EFI motor (304) or EFI heads on a traditional block, these headers deliver exceptional exhaust scavenging for high performance 304, 355, or supercharged builds. Note: Engineered for
Pacemaker 1 3/4" Competition Tri-Y Headers - Holden HQ-WB 304-355 5.0L EFI - PH5275 L/R
Maximize the performance of your EFI-converted classic Holden with these premium Pacemaker Competition Tri-Y headers. Specifically designed for HQ through WB models fitted with a 5 Litre EFI motor (304) or EFI heads on a traditional block, these headers deliver exceptional exhaust scavenging for high-performance 304, 355, or supercharged builds. Note: Engineered for engine conversions using VN-VT Series 1 engine platforms.
Features:
This product offers the following high-performance features:
- Competition Tri-Y Design: Features large 1¾" (44mm) primary pipes transitioning to 2" (51mm) secondaries for maximum torque and high-rev flow.
- Stroker & Supercharger Ready: Specifically tuned to support 5.7 Litre stroked engines or supercharged applications requiring high-volume exhaust evacuation.
- Broad Compatibility: Precision engineered to clear various manual and automatic transmissions, including Supra 5-speed and Turbo 700 conversions.
Product Specifications for PH5275 L/R
| Feature | Value | Feature | Value |
|---|---|---|---|
| Part # | PH 5275 | Gasket | DSF 63 |
| P/Steering | Yes | Primary Pipe | 1¾" (44mm) |
| Air Con | Yes | Secondary Pipe | 2" (51mm) |
| Oxy Sen | Yes | Outlet | 3" (76mm) |
| E.G.R | N/A | Y Branch | N/A |
| Fitting Time | 2 Hrs | Design | Competition Tri-Y |
Important Notes:
- Compatible with High Energy Sump (including HE2101).
- Will clear HQ type mechanical clutch linkages.
- Fits a wide range of transmissions including Australian 4-speed, VN-VS 5-speed, Supra 5-speed, Trimatic, and Turbo 350/400/700.
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 PH5275 L/R
| Make | Model | From | To | Body | Series | Engine | Variant | Drivetrain |
|---|---|---|---|---|---|---|---|---|
| HOLDEN | ||||||||
| Holden | Kingswood / Monaro / Ute | 1971 | 1984 | Sedan / Wagon / Ute / Van | HQ-WB | 304 / 308 EFI | 5.0L Engine Conv. | 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:
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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
4.3 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Permission to Help My Child Find Joy
Format: Hardcover
As a parent starting the college search process, I've really come to appreciate Jeff's insights in his previous books, podcast and newsletter. So pleased to finally have this book at my disposal, and less than a month in, it's already dog-eared and marked up!
Like most parents out there, I'm fighting my own internal inertia to align my child's accomplishments against the "metrics" (real or imagined) of admission, and gravitating towards the big names. If you are in that stage, I'll say from personal experience that now is a great time to pick up this book. It's a quick read (for someone who's not a "reader"), and it plants the right questions and data in your head to open your perspective.
Its funny, every good parent I know just wants their kid to be happy, to find their joy in life. When it comes down to it, our only equating of big name to their happiness comes a derivation that success brings happiness, and big school brings success. As Jeff suggests, this book doesn't say DON'T seek the big name... It just gives permission to look more broadly, that the same success, and perhaps even greater happiness, can be found elsewhere. Now we just need need to make sure our kids see that too, and they are empowered to seek their joy with our full support.
There is still data in here that confirms name schools do convey certain advantages. Whether those advantages align with a child's success and happiness is the question we can chase in this process. I, for one, really appreciate Jeff's efforts to make the case for the broader search and taking the time to do it with excellent, fresh analysis of the data in hand. Maybe this book and others generate the momentum to continuing these unique data streams to break the US News/Naviance overload of the process.
Good luck to everyone in a similar boat, and I hope you find this as useful a reference as I did.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 22, 2025
★★★★★ 4
Good Book!
Format: Hardcover
Pretty insightful book! I don't read college books too often but Selingo has very very good ideas that can easily transfer to college.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
★★★★★ 5
Great read to start on the college search journey
Format: Hardcover
Highly recommend for high school parents and students!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
★★★★★ 5
Good advice
Format: Hardcover
Good advice for my younger relatives
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
★★★★★ 5
Works well
Format: Hardcover
I learned a lot about current college selection process. I still recommend urging your kids to apply for stretch colleges. Don't limit to safe schools. But this book helped me understand the nature of current college student selection process, i feel less crazy re contradictory results.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
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