Porsche 997 GT2 Turbo Hotside Part Numbers: Complete Guide

The Porsche 997 GT2 is a high-performance variant of the 911 generation, equipped with a twin-turbocharged 3.6L flat-six engine. The "hotside" of the turbo system refers to the exhaust manifold and turbine housing that route exhaust gases to spin the turbocharger. When rebuilding or upgrading your 997 GT2's turbo system, having the correct part numbers is critical to ensure proper fitment and performance. This guide covers OEM and aftermarket part numbers for the hotside components, including manifolds, turbine housings, gaskets, and associated hardware.

OEM Porsche Part Numbers for the 997 GT2 Hotside

Porsche original equipment parts are engineered to exact specifications. For the 997 GT2 (model years 2007–2010), the turbocharger assembly is sourced from BorgWarner (formerly KKK). The following are the key hotside part numbers:

Turbocharger Assembly

• Left (driver side): 997.145.710.01 (or 997.145.710.00 for earlier production)
• Right (passenger side): 997.145.711.01 (or 997.145.711.00)

These assemblies include the turbine housing and internal wastegate but are often sold as a complete unit. The turbine housing itself is integrated into the assembly and not typically sold separately as a genuine Porsche part.

Exhaust Manifolds

• Left manifold: 997.145.702.01
• Right manifold: 997.145.703.01

The manifolds are cast iron and feature integrated heat shields. If you are replacing only the manifold (due to cracking or warping), these are the direct fit numbers.

Hotside Pipes and Connecting Hardware

• Hotside charge pipe (from turbo to intercooler): 997.110.435.01 (left), 997.110.436.01 (right)
• Turbo oil feed line: 997.110.441.01
• Turbo coolant line: 997.110.442.01
• Exhaust manifold gasket set: 997.145.719.01 (includes both sides)
• Turbo to manifold gasket: 997.145.720.01 (sold per turbo, order 2)

Wastegate Assembly

• Wastegate diaphragm (integrated in turbo): Not serviced separately; replace turbo assembly if wastegate fails.
• Wastegate actuator (if replaced separately): 997.145.722.01

Important Notes on OEM Parts

• The 997 GT2 and 997 GT2 RS (2010–2011) share the same turbocharger part numbers, but the RS uses different engine management and intercoolers.
• Verify your VIN with your dealer or parts supplier, as Porsche made minor revisions during production.

Aftermarket Upgrade Hotside Part Numbers

For high-horsepower builds, many owners opt for upgraded turbo systems. Common aftermarket suppliers include Kline, Kline Designs, Garrett, and Precision Turbo. Below are part numbers for popular hotside upgrades.

Kline GT2R Twin Turbo Kit

Kline is a leading manufacturer of Porsche turbo systems. Their kit for the 997 GT2 includes a custom hotside with larger manifolds and housings.

• Kline manifold set (left & right): K-T997-001 (contact for exact configuration)
• Kline turbine housing (Tial V-band, 0.82 A/R): Tial-STD-082 (sold per turbo) Note: Kline parts are typically V-band for easier installation.

Garrett GT35R Based Upgrades

Many custom shops use Garrett GT35R or GTX3582R turbos with custom hotside adapter plates.

• Garrett turbine housing, T3 flange, 0.63 A/R: 741005-0002
• Garrett turbine housing, T3 flangge, 0.82 A/R: 741005-0004
• Universal T3 manifold flange for Porsche 911 turbo: Often custom, no standard part number.

BorgWarner EFR Upgrades

The 997 GT2's OE supplier BorgWarner offers EFR series turbos as direct replacements.

• EFR 8374 turbine housing, twin-scroll T4 flange: 172939 (0.92 A/R)
• EFR 9180 turbine housing, twin-scroll T4 flange: 172940 (0.92 A/R) Note: These require a custom manifold or adapter plate.

Aftermarket Exhaust Manifolds

• Competition Engineering cast manifold (OEM replacement with better flow): CE-P997-001
• Evoms billet aluminum manifolds (high-end, custom spec): EVO-997-001 (requires tuning)

How to Read and Verify Part Numbers

Porsche part numbers follow a 10-digit format: XXX.XXX.XXX.XX. The first three digits indicate the model series (997), the next three the main group (145 for turbocharger, 110 for engine induction), then the specific component, and a two-digit suffix for revisions. Always cross-reference with an online parts catalog (such as the Pelican Parts VIN lookup) before ordering.

To verify compatibility:

1. Check your vehicle's VIN and model year (2007–2010 for GT2, 2010–2011 for GT2 RS).
2. Confirm the turbo side: left (driver in US) vs right.
3. Look for the stamped part number on your existing component.

Common Pitfalls When Ordering

Year-Specific Differences

Early 2007 GT2s (model year 2007) had slightly different oil drain lines. The manifold part numbers are the same, but the turbo assembly suffix changed from .00 to .01 in later production. Verify before buying used parts.

GT2 vs GT2 RS

While the turbocharger part numbers are identical, the GT2 RS uses a different engine control unit and larger intercoolers. The hotside itself is interchangeable. If you are swapping a GT2 RS engine into a GT2, the hotside is a direct bolt-on.

Aftermarket Fitment

Aftermarket turbine housings often require adapting the downpipe, wastegate, and oil/coolant lines. Some kits include these, but others do not. Always confirm that the aftermarket part number includes all necessary hardware.

Installation Considerations

When replacing the hotside, you must also replace all gaskets and seals. Use OEM gaskets or high-quality aftermarket equivalents:

• Manifold gaskets: Stock 997.145.719.01 (copper or multi-layer steel)
• Turbo to manifold gasket: 997.145.720.01 (two needed)
• Turbo oil drain seal: 997.110.447.01 (o-ring)
• Turbo coolant seal: 997.110.443.01 (o-ring)

Torque specifications are critical: manifold nuts to 20 Nm + 90° turn; turbo bolts to 45 Nm.

Tools Required

• Torque wrench (10–80 Nm)
• E12 Torx socket (for manifold bolts)
• 10mm Allen socket for turbo bolts
• Snap ring pliers for V-band clamps (if upgrading)

Final Recommendation: OEM vs Aftermarket

For most street cars, the OEM turbo system is reliable to 600–700 hp. Stick with OEM part numbers 997.145.710.01 and 997.145.711.01 if you are rebuilding to stock. If you plan to exceed 700 hp, the Kline or Garrett based upgrades are proven. However, aftermarket parts require professional installation and tuning.

For a simple gasket or manifold replacement, OEM parts are the safest choice. For a full turbo upgrade, work with a shop that has experience with 997 GT2 aftermarket systems—custom fabrication may bypass standard part numbers entirely.

Check your specific setup before ordering. Keep a log of your part numbers and revisions to simplify future maintenance. With the right hotside part numbers, your 997 GT2 will continue to deliver exhilarating performance.