P1 Fasteners
Purpose-Built Fasteners for Serious Engines
Fasteners are often treated as a commodity. In reality, they’re one of the most critical components in any high-performance engine. When cylinder pressure rises, boost increases, and RPM climbs, the margin for error disappears. That’s exactly where P1 Fasteners are designed to live.
Engineered, Not Just Manufactured
P1 Fasteners are developed with a clear philosophy: engineered solutions for modern performance engines. Every design choice—from material selection to thread form and undercut geometry—is driven by real-world load cases, not legacy assumptions.
What sets P1 apart is the focus on:
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Optimised clamping force without overstressing the fastener
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Improved load distribution through undercut and shank design
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Consistent stretch characteristics for predictable torque values
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Repeatable performance during teardown and reassembly
This isn’t about chasing headline tensile numbers. It’s about usable, reliable clamping where it actually matters.
Designed for Builders, Tuners, and Racers
P1 Fasteners are built for people who assemble engines for a living—or rely on them under extreme conditions. Whether it’s a street-driven performance build or a full race engine, P1 hardware is designed to make life easier for the builder and safer for the engine.
Benefits you’ll notice immediately:
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Accurate torque-to-clamp correlation
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Cleaner installs with high-quality threads and finishes
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Confidence during high-cylinder-pressure operation
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Hardware that supports modern fuels and power levels
When tolerances are tight and consequences are expensive, details matter.
Materials That Match the Application
Rather than a one-material-fits-all approach, P1 Fasteners use application-specific alloys and heat treatments to suit the job at hand. This ensures the fastener behaves correctly under load, heat, and cyclic stress—key factors in today’s high-output engines running E85, methanol, or aggressive boost.
The result is fasteners that don’t just survive harsh environments—but are designed for them.
Why Prime Speedworks Chose P1
At Prime Speedworks, we don’t stock parts because they’re popular—we stock them because they solve problems. P1 Fasteners align perfectly with our philosophy: modern engineering, real performance, no compromises.
If you’re building an engine where reliability matters just as much as power, P1 Fasteners deserve a place in it.
Available Now
P1 Fasteners are available now at Prime Speedworks, with a growing range covering popular performance and motorsport applications. RB, 2J, LS, Small Block Chevrolet etc.
If you’d like help selecting the right kit for your build—or want to understand where P1 fits into your engine combination—get in touch. We’re builders and racers first, parts suppliers second.
Build it once. Clamp it properly. Trust the hardware.
