91161 Max Effort Retro-Fit Hydraulic Roller Lifter Set Chevy Big Block Mark IV

Name: 91161 Max Effort Retro-Fit Hydraulic Roller Lifter Set Chevy Big Block Mark IV
Brand: HOWARDS CAMS
SKU: 466-91161
Price: 675.99 USD
Availability: InStock

^$675⁹⁹

2 left in stock

Ships on Oct 26, 2026

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Max Effort Retro-Fit Style

Chevy Big Block Mark IV
2.618 in. Seat Height
0.842 in. Body Diameter
273g
+0.300 in. Body Height
Center Exhaust Offset
Center Intake Offset
Set of 16

These Howards Cams 91110 Maximum Effort Retro-Fit Hydraulic Roller Lifters are a direct fit for Chevy Big Block engines when replacing the original flat tappet camshaft with an aftermarket hydraulic roller camshaft.

FAQ
Are roller lifters better than hydraulic?
The choice between roller lifters and hydraulic lifters depends on specific engine requirements and preferences. Roller lifters, such as those in Howards 91161 retro-fit hydraulic roller lifter set, are known for reduced friction and enhanced valvetrain stability, potentially offering improved performance at higher RPMs. Hydraulic lifters, on the other hand, are known for ease of maintenance and self-adjustment. The decision between the two depends on factors like engine type, usage, and desired performance characteristics.
What is the difference between a solid lifter cam and a hydraulic lifter cam?
The primary difference between a solid lifter cam and a hydraulic lifter cam lies in the lifters and their valvetrain operation. Solid lifters have no internal hydraulic components, requiring periodic adjustments for valve lash, making them suitable for high-performance applications. Hydraulic lifters, like those in the Howards 91161 retro-fit hydraulic roller lifter set, feature internal valving for self-adjustment, reducing the need for regular adjustments and providing a smoother valvetrain operation, making them suitable for street and performance applications with less maintenance.
Can you use roller rockers with a hydraulic cam?
Yes, it is common and acceptable to use roller rockers with a hydraulic cam. Roller rockers, when paired with a hydraulic cam, can further improve valvetrain efficiency and reduce friction. The combination of a hydraulic cam and roller rockers enhances the overall performance and longevity of the valvetrain components. This compatibility offers flexibility in customizing your engine setup to achieve optimal performance and efficiency, giving enthusiasts the versatility they need in their builds.

Features

Maximize your engine's capabilities
Five varieties of lifters available to best suit the chosen engine's application
Precision machining provides accurate and repeatable performance

High Endurance Hydraulic Roller Lifters

High Endurance Hydraulic Roller Lifters are designed for applications where the engines run for extended periods of time. These lifters feature hydraulic valving designed to run continuously up to 6600 rpm. Each lifter body is CNC machined with an 8620 case hardened steel nose wheels for superior service life. These roller lifters are paired together using a vertical lifter bar.

Max Effort Retro-Fit Hydraulic Roller Lifters

Max Effort Retro-Fit Hydraulic Roller Lifters are specifically designed for moderate-high lift street strip and marine applications. Each of these lifters is CNC machined with a precision check ball internal valving to prevent lifter "pump up." These lifters are available with or without vertical lifter bars.

OE Style Hydraulic Roller Lifters

OE Style Hydraulic Roller Lifters are high-performance direct replacements for stock lifters. These lifters are designed to reduce friction and increase torque and horsepower without major engine modifications.

Pro Max Hydraulic Roller Lifters

Pro Max Hydraulic Roller Lifters are designed for high RPM engines that commonly operate at over 7000 rpm. These lifters utilize unique internal valving to allow for increased RPM, torque, and horsepower. Each lifter body is CNC machined with an 8620 case hardened steel nose wheels for superior service life. Pro Max Hydraulic Roller Lifters require seat spring pressures of 200-225 lbs. and open spring pressures of 500-575 lbs.

Street Series Hydraulic Roller Lifters

Street Series Hydraulic Roller Lifters are designed for engine conversions to hydraulic roller lifters. Each lifter body is constructed of tempered steel and topped with hardened steel roller wheels and stainless steel vertical lifter bars. These lifters work best in applications under 6500 rpm.

Part TypeLifter

Product LineHowards Cams Hydraulic Roller Lifters

BrandHOWARDS CAMS

Package Height3.3

Package Width3.5

Package Length8.1

Weight5.29 PG

Part CategoryPerformance Parts

Part FitmentSemi Universal

Vendor Part Number91161

Package Qty1

Package TypeEA