Parts for EVO Supercharger Kit for Porsche: A Complete Guide

If you own a Porsche and are considering an EVO supercharger kit, you need to know exactly which parts are required. This guide breaks down every component, from the supercharger unit to supporting modifications, helping you make informed purchasing decisions.

Understanding EVO Supercharger Kit Parts

The Supercharger Unit

The supercharger is the core of the kit. EVO kits typically use a centrifugal supercharger that delivers linear boost as RPMs rise. You'll choose between self-contained (oil-free) or oil-fed units. Self-contained models are easier to install and maintain, while oil-fed units may offer longer service life. Compatibility with your specific Porsche engine (e.g., M96, M97, 9A1) is critical.

Mounting Brackets and Hardware

Custom mounting brackets position the supercharger securely in the engine bay. These must be model-specific—brackets for a 911 996 will not fit a Cayman S. The kit also includes bolts, spacers, and sometimes a reinforcement plate. Check that the hardware is grade 8 or better for reliability.

Intercooler System

Forced induction raises intake air temperatures, so an intercooler is essential. EVO kits often include an air-to-air intercooler, though water-to-air options are available for tighter spaces. Look for a bar-and-plate core design for superior heat transfer. Core size should match your power goals; larger cores cool better but may require bumper modifications.

Fuel System Upgrades

More boost demands more fuel. Typical upgrades include larger fuel injectors (550cc to 1000cc, depending on target horsepower), a high-flow in-tank pump (such as a Walbro 450 or equivalent), and an adjustable fuel pressure regulator. Ensure the injectors are compatible with your engine management system—EVO kits often recommend Bosch or Siemens injectors.

Engine Management Tuning

To safely control boost and fueling, the ECU must be recalibrated. Most EVO kits include a piggyback ECU (like a Split Second or Unichip) or a reflash of the stock ECU. Verify that the tune is specifically developed for your Porsche’s engine code and includes features like knock control and boost safety limits.

Essential Supporting Parts

Boost Controller and Blow-Off Valve

An electronic boost controller (e.g., from HKS, GReddy, or Turbosmart) allows you to adjust boost levels from inside the cabin. A blow-off valve (BOV) prevents compressor surge when the throttle closes. Choose a recirculating BOV for quieter operation or a vent-to-atmosphere for a more aggressive sound. Ensure the BOV is compatible with your supercharger’s boost range.

Intake and Exhaust Upgrades

A high-flow intake with a dry air filter reduces restriction. The intake tube should be silicone or aluminum with smooth mandrel bends. For exhaust, a cat-back system with 2.5- or 3-inch piping reduces backpressure. Avoid full decat if you need to pass emissions—consider high-flow catalytic converters.

Cooling System Enhancements

Higher power generates more engine heat. An upgraded radiator with increased core thickness helps. An auxiliary oil cooler (e.g., Setrab or Earl’s) is recommended for street and track use. Some installers add a water-to-oil heat exchanger for the supercharger oil if using an oil-fed unit.

Drive Belt and Pulley

The supercharger is belt-driven. EVO kits include a longer belt and may offer different pulley sizes to adjust boost. A smaller pulley increases boost but requires higher fuel octane and stronger internals. Stick to the pulley supplied in the kit unless you have verified engine build upgrades.

Compatibility Considerations

EVO supercharger kits are commonly available for Porsche 996 (1998-2004), 997 (2005-2012), Cayman S (2006-2012), and Boxster S models. Engine types matter: the M96 in early 996 differs from the 9A1 in later 997. Always confirm fitment with the kit manufacturer using your VIN. Some parts, like intercooler piping, may need modifications for cars with factory sport exhaust or aftermarket headers.

Also consider whether the kit is CARB legal if you live in California. Many EVO kits come with a CARB EO number for street use, but supporting parts like injectors and BOVs may not be covered.

Buying Tips and Recommendations

• Complete kits vs. piecemeal: A complete kit ensures all parts match. Buying components separately can lead to fitment issues and void warranties.
• Brand reputation: Stick with well-known EVO system integrators—they offer technical support and often include a base tune. Look for kits that have been developed specifically for Porsche models.
• Tuning options: Some kits require a mail-order tune; others include live dyno tuning. If you can, choose a kit that includes remote tuning support so you can dial in the AFR and timing.
• Installation effort: Expect 10-20 hours of labor for a DIY mechanic. Professional installation adds cost but may be worth it for complex systems. Factor in $1,000-$1,500 for professional install.
• Warranty and support: Reputable sellers offer a warranty on the supercharger unit (often 1-2 years) and technical phone support.

Final Recommendation

Start with a proven EVO supercharger kit from a trusted supplier that includes a supercharger, mounting brackets, intercooler, fuel injectors, fuel pump, boost controller, and engine management. Don’t skip supporting mods like an upgraded radiator, oil cooler, and a quality blow-off valve. If you’re not experienced with forced induction, budget for professional installation and a custom dyno tune to maximize safety and performance. With the right parts in place, your Porsche will gain 100+ horsepower reliably while retaining drivability.