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Porsche > 964 (911) (1989-1994) > 964 (911) RS 3.6L 1991-93 > Engine Tuning >

Hoses / Kits

DISPLAYING 1 to 2 (of 2 products)
Silicone coupler sleeve set for GT3 intake manifold plenum to throttle body. Porsche 964 / 993 / 996 - 99611068551, 99611068552, 99611068553, 99611068650 - SL-RC-GT3-4
4
Silicone coupler sleeve set for GT3 intake manifold plenum to throttle body. Porsche 964 / 993 / 996
99611068650/1
Product Information
Product Information

Silicone coupler sleeve set for GT3 intake manifold plenum to throttle body. 
Sold as a set of 4

Fits:
Porsche 964 - 1989 to 1994 (with GT3 inlet upgrade)
Porsche 993 - 1994 to 1998 (with GT3 inlet upgrade)
Porsche 996 - 1997 to 2005 (with GT3 inlet upgrade)

The original rubber couplers for Porsche 996 and 997 GT3 models have become increasingly costly and hard to source, and many enthusiasts opt to avoid them for high-performance applications like hot rods or track cars due to their limited heat resistance.

Our precision-molded OEM+ silicone sleeves are the perfect direct replacement, offering double the temperature resistance of the original rubber couplers along with an enhanced appearance. These high-quality sleeves are essential for replacing worn-out rubber parts and are ideal for air-cooled hot rods undergoing a modern DBW (Drive-By-Wire) conversion using a GT3 intake plenum.

This set includes four silicone sleeves 

Replaces Porsche part number 99611068552 and 99611068650

Diagram ref no 9 and 11



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99611068650
99611068551
99611068552
99611068553
99611068650

The product you are viewing cross references to these numbers
Silicone sleeve set for GT3 intake manifold. Porsche 964 / 993 / 996 - 99611068792, 99611068790 - SL-RC-GT3-6
2
Silicone sleeve set for GT3 intake manifold. Porsche 964 / 993 / 996
99611068792/1
Product Information
Product Information

Silicone sleeve set for GT3 intake manifold. Porsche 964 / 993 / 996
Sold as a set of 6

silverlake

Fits:
Porsche 964 - 1989 to 1994 (with GT3 inlet upgrade)
Porsche 993 - 1994 to 1998 (with GT3 inlet upgrade)
Porsche 996 - 1997 to 2005 (with GT3 inlet upgrade)

The original rubber couplers for Porsche 996 and 997 GT3 models have become increasingly costly and hard to source, and many enthusiasts opt to avoid them for high-performance applications like hot rods or track cars due to their limited heat resistance.

Our precision-molded OEM+ silicone sleeves are the perfect direct replacement, offering double the temperature resistance of the original rubber couplers along with an enhanced appearance. These high-quality sleeves are essential for replacing worn-out rubber parts and are ideal for air-cooled hot rods undergoing a modern DBW (Drive-By-Wire) conversion using a GT3 intake plenum.

This set includes six (6) silicone sleeves 

Replaces Porsche part numbers 99611068792 and 99611068790



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99611068792
99611068792
99611068790

The product you are viewing cross references to these numbers
DISPLAYING 1 to 2 (of 2 products)
About Hoses / Kits

Porsche Performance Hoses & Hose Kits - Engine Reliability & Cooling Upgrades

Engine Hoses and Hose Kits are responsible for transporting coolant, air, oil, and vacuum throughout the engine system. In high-performance or high-mileage Porsche vehicles, upgraded hoses are essential for maintaining pressure integrity, managing heat, and preventing leaks that can lead to serious engine damage.

Available from Design911, Porsche performance hose kits are engineered using high-quality materials such as reinforced rubber and silicone to deliver improved durability, heat resistance, and reliability in tuned, track-driven, and enthusiast-owned vehicles.

What Do Engine Hoses & Hose Kits Do?

Hoses and hose kits ensure the safe and efficient transfer of fluids and air within the engine system.

Core Functions:

  • Carry coolant, oil, air, and vacuum signals.
  • Maintain system pressure and flow integrity.
  • Support consistent engine cooling and lubrication.
  • Prevent leaks and fluid loss.
  • Enable reliable engine operation under load.

Proper hose function is critical for engine safety and performance.

Why Do Engine Hoses Fail?

Factory hoses are subject to heat, pressure, and chemical exposure, leading to degradation over time. Common failure causes include:

  • Rubber hardening and cracking due to heat cycles.
  • Oil contamination weakening hose material.
  • Swelling or collapse under increased pressure.
  • Age-related deterioration and fatigue.
  • Increased thermal load from tuned engines.

Failed hoses can result in coolant loss, overheating, oil leaks, or sudden engine failure.

Why Upgrade to Performance Hose Kits?

Performance hoses are designed to withstand higher temperatures and pressures.

Upgrade Benefits:

  • Improved resistance to heat, oil, and pressure.
  • Reinforced construction for long-term durability.
  • Reduced risk of leaks and hose collapse.
  • Ideal for tuned, track, and high-output engines.
  • Comprehensive kits simplify maintenance and upgrades.

Upgrading hoses improves reliability and protects critical engine systems.

Highlights

  • Porsche performance engine hoses and kits
  • Improved durability and heat resistance
  • Designed for tuned and high-performance engines
  • Reduces risk of leaks and hose failure
  • Ideal for preventative maintenance and rebuilds       

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