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https://x-ph.com/vtt-plug-and-play-s58-single-hpfp-conversion-kit-vtt-s58-single-hpfp/?ctk=f6bb4cbf-ed06-4140-9f39-6293cd462728&showHidden=true

The VTT S58 Single HPFP Conversion Kit is the first and only solution to fully eliminate exhaust cam timing drift on S58 engines — without locking the cam. Tested on builds exceeding 1400 WHP, this kit preserves the full benefits of variable valve timing while maintaining top-end performance, mid-range torque, and instant spool.

The Problem: S58 Exhaust Cam Timing Drift
High-RPM timing drift occurs when the exhaust VANOS sprocket cannot keep up with commanded timing. Contributing factors include:

• Two high-pressure fuel pumps (HPFPs)

• Upgraded, higher-pressure valve springs

• Increased boost levels and higher cylinder pressures

This drift reduces top-end horsepower by 200–250 WHP and negatively impacts mid-range torque and spool.

Why Cam Locking Isn’t the Solution
Locking the cam sprocket can prevent timing drift but sacrifices performance:

• Locking for top-end power reduces spool and mid-range torque

• Locking for mid-range responsiveness decreases high-RPM horsepower

Variable valve timing is designed to optimize low-end torque and high-end power simultaneously — and this kit preserves that benefit.

The VTT Solution: Reduce Load by 50%
The S58 timing drift is caused by mechanical load on the exhaust cam gear. This kit eliminates the forward HPFP, cutting the driven load by half. Key advantages:

• High-power S58 builds typically use supplemental fueling, so one HPFP is sufficient

• Direct injection contributes only 20–30% of fuel at high RPM

• Minor port injection adjustments compensate for the removed pump

Gen 2 B58 platforms have achieved over 1500 WHP on a single HPFP, demonstrating this solution’s effectiveness.

Built Like OEM — But Stronger
VTT’s S58 Single HPFP Conversion Kit features:

• Heavy-duty stainless steel hardlines manufactured with OEM-style forming and swedging

• Clean OEM-style fitment and routing

• Superior durability under extreme heat and pressure

• No braided lines or additional fittings to fail

What’s Included:

• CNC-machined billet HPFP block-off plate

• Rear high-pressure stainless steel hardline with integrated sensor port

• Front high-pressure stainless steel hardline replacement

• Plug-and-play 2-to-1 HPFP wiring harness

Installation & Tuning Requirements:

• Custom tuning adjustments are required, including port injection strategy updates

• Optional increase of oil pressure at high RPM recommended for extreme builds

• Professional installation and tuning are mandatory

Key Benefits:

• Eliminates S58 exhaust cam timing drift without cam locking

• Maintains full variable valve timing benefits

• OEM-style stainless steel hardlines for reliability and appearance

• Proven on high-power S58 builds as a mechanical solution to a mechanical problem

The VTT Single HPFP Conversion Kit is the only complete solution for S58 engines that demand maximum top-end power, instant spool, and consistent cam timing under extreme conditions.