WnSEu MSCRP C5 Corvette Fuel Pressure Regulator 58 PSI — 255 LPH Flow for LS Swap (550–600 HP)

WnSEu MSCRP C5 Corvette fuel pressure regulator delivers a stable 58 PSI fuel reference for LS-swap EFI conversions and high-output GM engines.

If you’re converting a vehicle to an LS-series engine or upgrading fuel delivery for boosted or high-horsepower naturally aspirated setups, choosing the right regulator is crucial. The WnSEu MSCRP C5 Corvette regulator is built to maintain a firm 58 PSI system pressure, support up to 255 liters per hour flow, and accommodate engines in the 550–600 HP range. It directly fits or cross-references part numbers like GF822, 10299146, 19239926, and 33737, and is compatible with many intake configurations including TBSS, NNBS and L92.

How will this regulator improve fuel delivery on an LS swap?

The regulator maintains a consistent 58 PSI reference pressure so the fuel system can deliver predictable injector performance under load. That reduces fuel pressure fluctuation and helps your ECU tune more reliably across rpm ranges.

• Constant 58 PSI base pressure for stable fueling
• Maximum 255 LPH flow to match higher-demand injectors
• Supports power levels typically seen with 550–600 HP builds

Which engines and setups is this compatible with?

It’s tailored for GM LS-family swaps and return-style fuel systems but works with many modern LS intakes and returnless designs where an external regulator is required. Check cross-reference part numbers and intake type to confirm fitment.

• Fits LS platforms: LS1, LS2, LS3, LS6, LQ4, LQ9, LM7, L99, L76, LSX, 4.8, 5.3
• Compatible with TBSS, NNBS, L92 and similar intakes
• Cross-references: GF822, 10299146, 19239926, 33737

What performance limits and flow specs should I expect?

The unit is rated to support a maximum flow of 255 liters per hour and is suitable for builds up to about 550–600 horsepower when paired with appropriate pumps and injectors. It’s intended for high-flow EFI applications where consistent pressure is required.

• Rated flow: up to 255 LPH
• Designed for builds in the 550–600 HP range
• 58 PSI reference pressure to suit high-impedance injector setups

How do I install and tune this regulator in a conversion project?

Installation typically replaces or augments the factory regulator on a return-style rail or mounts inline in returnless conversions converting to a return setup. After installation, verify pressure with a gauge at idle and under load, then refine ECU fuel trims as needed.

• Mount on a return-equipped fuel rail or add return line for returnless swaps
• Use a calibrated fuel pressure gauge to confirm 58 PSI at the rail
• Make ECU adjustments or fuel map refinements after pressure confirmation

Who is this for? The WnSEu MSCRP C5 Corvette 58 PSI fuel pressure regulator is aimed at DIY and professional builders performing LS swaps, high-output naturally aspirated or forced-induction conversions who need a reliable, high-flow regulator. It’s well suited for street/track cars upgrading to larger injectors and pumps, or for anyone replacing OEM regulators with a higher, fixed pressure reference for consistent EFI performance. Before purchase, confirm your intake configuration, part-number compatibility, and that your fuel pump can meet system flow and pressure requirements.