Halltech Systems Flex-Lock 4.5-Inch to 4.25-Inch Reducing Hump Hose - Hose without PCV Hole - No PCV Fitting Needed (2006 - 2013 Chevrolet Corvette C6 Z06 / 2008 - 2013 C6 LS3 / 2010 - 2013 Grand Sport) - H-4.5X4.25-RHH
Connect a Halltech KillerBee-series intake bridge to a Nick Williams 103 throttle body with the Halltech Systems Flex-Lock 4.5-Inch to 4.25-Inch Reducing Hump Hose H-4.5X4.25-RHH. The 4.5-inch intake-side ID is sized for Halltech's KillerBee-series intake bridges, while the 4.25-inch throttle-body side is designed to fit the Nick Williams 103 throttle body. This configuration is supplied without a PCV hole and does not include a PCV fitting, making it the correct choice when your setup does not require that connection through the throttle-body hose.
Halltech's Flex-Lock design goes well beyond a basic silicone reducer. The mandrel-formed hose uses seven-layer Nomex-reinforced silicone construction, a compliant hump section that accommodates engine movement and torque, and internal grip ridges at each end to increase engagement with the throttle body and intake tube. At 3 inches long with a nominal 0.142-inch wall thickness, the H-4.5X4.25-RHH provides the size transition, controlled flexibility, and mechanical grip needed to connect a KillerBee intake to a 103mm Nick Williams throttle body. Two stainless steel hose clamps are included.
Specifications
- Manufacturer: Halltech Systems
- Part Number: H-4.5X4.25-RHH
- Product: Flex-Lock 4.5-Inch to 4.25-Inch Reducing Hump Hose
- Intake-Side ID: 4.5 inches
- Throttle-Body-Side ID: 4.25 inches
- Intake Compatibility: Halltech KillerBee-series intake bridges
- Throttle Body Compatibility: Nick Williams 103 throttle body
- Hose Length: 3 inches
- Nominal Hose Thickness: 0.142 inch
- Construction: Seven-layer Nomex-reinforced silicone
- Design: Mandrel-formed reducing hump hose
- Grip Design: Internal grip ridges at each end
- Hump Section: Compliant design to accommodate engine movement and torque
- Hose Clamps: Two stainless steel hose clamps included
- PCV Hole: Not included with this configuration
- PCV Fitting: Not included or needed with this configuration
Features
- Transitions from a 4.5-inch Halltech KillerBee-series intake bridge to a 4.25-inch Nick Williams 103 throttle body connection
- Halltech Flex-Lock design combines controlled flexibility with positive mechanical grip
- Seven-layer Nomex-reinforced silicone construction
- Compliant hump section accommodates engine movement and torque
- Internal grip ridges increase engagement at both ends of the connection
- Mandrel-formed construction
- 3-inch overall hose length
- Nominal 0.142-inch hose thickness
- Includes two stainless steel hose clamps
- No PCV hole in this configuration
- No PCV elbow fitting included or needed with this configuration
Built for a KillerBee Intake and 103mm Throttle Body
The H-4.5X4.25-RHH is sized specifically for the transition created when pairing a Halltech KillerBee-series intake bridge with a Nick Williams 103 throttle body. Its 4.5-inch intake-side ID fits the larger KillerBee bridge, while the 4.25-inch throttle-body-side ID fits the Nick Williams 103 throttle body. That gives you the correct reduction without relying on a generic straight hose or improvised adapter.
Seven-Layer Nomex-Reinforced Flex-Lock Construction
Halltech builds its Flex-Lock hose with seven layers of Nomex-reinforced silicone for a resilient connection between the intake system and throttle body. The hose is mandrel formed and measures 3 inches long with a nominal wall thickness of 0.142 inch. This construction is designed to provide the combination of flexibility and secure engagement needed at a connection exposed to engine movement and torque.
Compliant Hump Section Accommodates Engine Movement
The hump built into the H-4.5X4.25-RHH gives the connection controlled compliance instead of forcing the intake bridge and throttle body to behave like a completely rigid assembly. As the engine moves under torque, the hump section can flex where movement needs to be absorbed while maintaining the transition between the intake and throttle body.
Internal Grip Ridges Help Keep the Connection Secure
Halltech incorporates internal grip ridges at each end of the Flex-Lock hose to increase mechanical engagement with the intake bridge and throttle body. Combined with the two included stainless steel hose clamps, the ridged design helps the hose lock securely onto the components it connects rather than relying solely on clamp pressure against a smooth inner surface.
No PCV Hole or PCV Fitting
This H-4.5X4.25-RHH configuration is supplied without the optional PCV hole and does not include a PCV elbow fitting. Halltech offers both options for installations that require PCV capability through the throttle-body hose, but they are intentionally omitted from this configuration. Choose this version when your specific intake setup does not require the PCV connection at this location.
Fitment
- 2006 Chevrolet Corvette C6 Z06
- 2007 Chevrolet Corvette C6 Z06
- 2008 Chevrolet Corvette C6 Z06
- 2009 Chevrolet Corvette C6 Z06
- 2010 Chevrolet Corvette C6 Z06
- 2011 Chevrolet Corvette C6 Z06
- 2012 Chevrolet Corvette C6 Z06
- 2013 Chevrolet Corvette C6 Z06
- 2008 Chevrolet Corvette C6 LS3
- 2009 Chevrolet Corvette C6 LS3
- 2010 Chevrolet Corvette C6 LS3
- 2011 Chevrolet Corvette C6 LS3
- 2012 Chevrolet Corvette C6 LS3
- 2013 Chevrolet Corvette C6 LS3
- 2010 Chevrolet Corvette C6 Grand Sport
- 2011 Chevrolet Corvette C6 Grand Sport
- 2012 Chevrolet Corvette C6 Grand Sport
- 2013 Chevrolet Corvette C6 Grand Sport
Fitment Note: This reducing hump hose is intended for the applicable Halltech KillerBee-series intake bridge paired with a Nick Williams 103 throttle body. Vehicle year and model alone do not determine compatibility. This specific configuration does not have a PCV hole and does not include a PCV fitting.
FAQs
What throttle body is the Halltech H-4.5X4.25-RHH designed to fit?
The 4.25-inch end is designed to fit a Nick Williams 103 throttle body, while the 4.5-inch end fits Halltech KillerBee-series intake bridges. The reducing design provides the transition needed between those two connection sizes.
Does this H-4.5X4.25-RHH include a PCV hole or PCV fitting?
No. This configuration is supplied without the optional PCV hole and does not include a PCV elbow fitting. It is intended for setups that do not require the PCV connection through this hose.
Get Your Halltech Flex-Lock Reducing Hump Hose from Beefcake Racing
Connect your Halltech KillerBee intake to a Nick Williams 103 throttle body with the H-4.5X4.25-RHH Flex-Lock Reducing Hump Hose from Beefcake Racing. For help confirming your intake, throttle body, or PCV configuration before ordering, contact us at sales@beefcakeracing.com or call 1-855-827-7223.
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