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Howards Cams Mechanical Roller ProMax Direct Lube Lifters; Chevy Mark IV, Gen 5/6 91191R - 91191R

Howards Cams Mechanical Roller ProMax Direct Lube Lifters

If you're looking to boost your Chevy Mark IV, Gen 5, or Gen 6 engine's performance, the Howards Cams Mechanical Roller ProMax Direct Lube Lifters (part number 91191R) are designed just for you. These lifters are the go-to choice for pro racers who demand reliability and performance on the track.

Key Features

  • Full-Time High Pressure Oiling: Unlike many other lifters that rely on timed oiling, these lifters provide continuous lubrication to the roller bearing shafts. This ensures optimal performance at higher RPMs and with increased spring pressures.
  • Lightweight Construction: Made from lightened steel alloy, the bodies of these lifters are not only durable but also designed for efficiency.
  • Superior Materials: Featuring heat-treated stainless steel link bars and case-hardened 8620 rollers, these lifters are built to last. The best alloy bearings and pins ensure smooth operation.
  • Versatile Fitment: With a .300" taller body, these lifters fit early, late model, and aftermarket blocks, making them a versatile choice for various builds.
  • Fully Rebuildable: Designed with longevity in mind, these lifters can be fully rebuilt, allowing you to maintain their performance over time.
  • Made in the USA: You can trust the quality and craftsmanship that comes with American-made products.

Benefits of Choosing Howards Cams 91191R Lifters

Choosing the Howards Cams ProMax lifters means you're investing in a product that’s been trusted by top racers. The continuous oiling feature reduces wear and tear, ensuring that your engine runs smoothly even under the most demanding conditions. Plus, the lightweight design helps in achieving better RPM efficiency.

Specifications

  • Part Number: 91191R
  • Height: .300" taller body
  • Material: Steel alloy, stainless steel, case-hardened 8620
  • Rebuildable: Yes

Popular Fitments for 91191R

  • Chevy 350 (Gen 5)
  • Chevy 454 (Gen 6)
  • Chevy 502 (aftermarket block)
  • Chevy 572 (aftermarket block)

Customer Reviews

Customers rave about the performance and reliability of the Howards Cams 91191R lifters. Many users have noted significant improvements in engine responsiveness and RPM capabilities. Here are some highlights from trusted reviews:

  • "These lifters have transformed my engine's performance. The continuous oiling is a game changer!"
  • "I love that they're rebuildable. It's great to know I can keep using them for years to come."
  • "Installation was straightforward, and the fitment was perfect on my 454. Highly recommend!"

Upgrade your Chevy's engine with the Howards Cams Mechanical Roller ProMax Direct Lube Lifters (91191R) and experience the difference in performance and reliability.

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

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Who is Howards Cams?

Howards Cams is an aftermarket company that Howards Johansen founded in 1945. It started as Howards Power & Racing Equipment and specialized in manufacturing high-performance racing cams for the automotive market. Even after turning the business over their oldest son, the company remained one of the best cam manufacturers in the industry.

Maximizing Their Racing Experience

The company has always used it is on-track experience to create powerful cam profile designs. It is why they have become one of the favorite brands of many top fuel dragster racers and drivers from other racing disciplines such as road racing, mudd bogging, marine racing, and circle track racing.

Advanced Manufacturing Technique

Howards Cams uses the most advanced computer design software to create the most competitive product out there. They offer a wide range of performance parts from camshafts, connecting rods, crankshafts, billet main caps, and forged pistons. All of these are made in the USA to ensure consistent quality.

Purchase Howards Cams Products At Vivid Racing

If you are in the market for high-performance parts for your engine, then look no further as Howard Cams is the brand for you. They have all the parts you need to create a fast machine and is trusted by many racers and enthusiast worldwide. If being on the top podium is your dream, then upgrade your engine with Howard Cams parts. 

To know more about the company, visit Vivid Racing and check out their list of products that fit your specific needs.

Warranty: Howards Cams Hydraulic/Mechanical Flat Tappet Camshafts are 100% Rockwell checked and parkerized at our manufacturing plantin Wisconsin. Howards Cams hydraulic and mechanical lifters are also 100% Rockwell checked for hardness to ensure that our customers receive the best American made components available. To give our customers a performance edge, Howards Cams will unconditionally replace to the original purchaser only, any non-usable hydraulic or mechanical flat tappet camshafts and lifters for 1/2 the amount of the original invoiced purchase price for a period of 6 months from the date of original retail purchase. Howards™ Cams does not warrant the performance of our products due to Howards™ Cams lack of control during product installation and usage. This applies to all camshafts, valve train components and all other racing components in our catalog and product line. Note: Due to oil available today, all Flat Tappet Cams (hydraulic or mechanical) must be initially ran with a quality break-in lube, such as Howards Z.P.M. Max. There is absolutely no warranty, expressed or implied or otherwise, on Howards Cams parts, labor, installation charges or other damaged parts. Howards Cams assumes no responsibility or liability whatsoever on incidental or consequential damages. There are no implied warranties of merchantability or fitness for a particular purpose. Howards Cams neither assumes nor authorizes any person to assume for it, any other obligation or liability in connection with the sale or use of our products. Howards Cams will replace or refund any part that has a manufacturers defect found before installation or alteration. Customers are responsible for blueprinting engine components before installation or startup.

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