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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:
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
4.8 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Worth every penny!
Excellent quality. Very easy installation. Took me less than 2 minutes. Holds phone securely. Looks very good. Easy adjustment. Very pleased. Worth every penny. Highly recommend.
Update: I've been using it almost 2 months and it seems very well made. No issues. Very satisfied.
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Reviewed in the United States on February 1, 2026
★★★★★ 5
Finally a mount for my truck!
2015 Toyota Tacoma Prerunner. I've tried many different mounts - ones that stuck to the dash, stuck to the windshield, one that mounted in the cup holder in the console. They all were bad in their own way. This Offroam mount finally got it right. Easy installation - and when I say SOLID hold I mean it. No movement, no rattle, do creaking sound, etc, etc. I was very skeptical of the one-handed use getting the phone in and out but it's really a genius design.
Seriously - I just got it, so can't really speak to longevity yet. Judging by the design and quality of parts, I'll say it will be the last mount I ever purchase for this truck. Pay the extra, and be happy.
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Reviewed in the United States on April 12, 2026
★★★★★ 5
Great Quality, Perfect Fit
2015 Tacoma. This fit perfectly and is solid. Last/Different one I had on another vehicle broke one of my vent dividers. That can't happen with this design. Worth the money. Would absolutely recommend.
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Reviewed in the United States on April 3, 2026
★★★★★ 5
Well build and functions nicely
The products build quality is excellent; in fact, its far superior to this product's competitor, "Batdiary". This mount stays locked in place when i use one hand to mount my phone or remove it. Also, the internal mechanism is much nicer than the Batdiary one and feels like it has tighter and more accurate machining tolerances which should prevent it from rattling like its competitor's did after a couple weeks use.
I highly recommend this product, it is worth the high price tag!
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Reviewed in the United States on November 6, 2025
★★★★★ 4
Buy once, cry once
This Offroam phone mount is not the cheapest option, but it is easily the most functional and sturdy one available, especially for second-generation Toyota Tacomas. I went through several plastic phone mounts before this and should have bought this one from the start to save both money and frustration.
Installation was very simple, and it is even easier to use day to day. I like that this mount uses adjustable arms to grip the phone rather than relying on MagSafe. It keeps my phone secure even on rough terrain and offers plenty of flexibility for positioning the phone exactly where you want it.
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Reviewed in the United States on January 25, 2026
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