Halltech Systems Flex-Lock 4.5-Inch to 4.25-Inch Reducing Hump Hose - Hose without PCV Hole - PCV Fitting Included (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 the optional PCV hole in the hose but includes the PCV elbow fitting.
Halltech's Flex-Lock design combines controlled flexibility with positive mechanical grip for a secure connection between the intake system and throttle body. The mandrel-formed hose uses seven-layer Nomex-reinforced silicone construction, a compliant hump section designed to accommodate engine movement and torque, and internal grip ridges at each end to increase engagement with the intake bridge and throttle body. The hose measures 3 inches long with a nominal 0.142-inch wall thickness, and 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: Included 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 hose
- Mandrel-formed construction
- 3-inch overall hose length
- Nominal 0.142-inch hose thickness
- Includes two stainless steel hose clamps
- Supplied without the optional PCV hole
- PCV elbow fitting included with this configuration
Built for a KillerBee Intake and Nick Williams 103 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 KillerBee-series bridge, while the 4.25-inch throttle-body-side ID fits the Nick Williams 103 throttle body. The reducing design provides the proper size transition without relying on a generic straight coupler or improvised adapter.
Seven-Layer Nomex-Reinforced Flex-Lock Construction
Halltech builds the Flex-Lock hose with seven layers of Nomex-reinforced silicone. The hose is mandrel formed and measures 3 inches long with a nominal wall thickness of 0.142 inch. This construction gives the connection the controlled flexibility needed between the intake bridge and throttle body while maintaining a secure interface between the two components.
Compliant Hump Section Accommodates Engine Movement
The hump section gives the H-4.5X4.25-RHH controlled compliance between the intake system and throttle body. As the engine moves under torque, the hump allows the hose to flex where movement needs to be absorbed rather than making the intake bridge and throttle body connection completely rigid.
Internal Grip Ridges Help Lock the Hose in Place
Halltech incorporates internal grip ridges at each end of the Flex-Lock hose to increase engagement with the intake bridge and throttle body. Combined with the two included stainless steel hose clamps, these ridges provide additional mechanical grip at both ends of the connection rather than relying only on clamp pressure against a smooth inner hose surface.
PCV Fitting Included - Hose Supplied without PCV Hole
This H-4.5X4.25-RHH configuration includes the PCV elbow fitting but the hose itself is supplied without Halltech's optional PCV hole. Halltech specifies that the added hole must be requested when PCV capability through the hose is required. Because this configuration does not include that hole, the supplied PCV fitting cannot be installed into the hose as delivered without subsequently creating the appropriate opening. This configuration is useful when you want the PCV fitting included but do not want Halltech to pre-drill the hose.
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 configuration includes the PCV elbow fitting but does not have the optional PCV hole in the hose.
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 between those two connection sizes.
Can I install the included PCV fitting into this hose as delivered?
No. The PCV elbow fitting is included with this configuration, but the hose is ordered without Halltech's optional PCV hole. Halltech specifies that the added hole must be requested when PCV capability is required through the hose, so an appropriate opening would need to be added before the supplied fitting could be installed in 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. This configuration includes the PCV fitting while leaving the hose without the optional PCV hole. 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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