Proform Wedge-Locking Exhaust Collector Bolts - Engine Builder Magazine

Proform Wedge-Locking Exhaust Collector Bolts

One less thing to come loose is enough of a reason to check out these simple locking bolts. Each Proform Grade 8 Collector Bolt and Nut combo includes two pairs of special locking washers.

One less thing to come loose is enough of a reason to check out these simple locking bolts. Each Proform Grade 8 Collector Bolt and Nut combo includes two pairs of special locking washers.

When the combo is torqued to 28+ ft.-lbs., the washers’ super-hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the flange. After being self-locked in this manner, any bolt-loosening rotation is blocked by a wedge-locking action created by the washers interfacing, matching cams.

Vibration that might ordinarily loosen the bolt actually increases the wedge-locking tension, securing the bolt even more. Because this simple wedge-locking method uses tension instead of friction, contact with oil actually facilitates the wedge effect. Proform Collector Bolts can be untightened with a normal wrench, lubricated, and reused.

  • Resists vibrating loose
  • Super-hard cam-locking washers
  • No little clips or retainers to handle
  • Oil actually improves performance
  • Economical and reusable

You May Also Like

Reid Machine’s 392 Intake Roller Rocker Arms

These rocker arms come ready to handle just about any racing application.

Reid Machine designs and manufactures its own line of racing products. Reid is currently featuring its 392 Intake Roller Rocker. The design of these rocker arms provides the stability required in the Top Fuel, Blown Alcohol, Injected, Fuel, and Pro Mod categories.

For more info:

Oliver Racing Big Block Chevy Max-Plus Connecting Rods

These new rods are beefed up in all right places to tackle high-horsepower applications.

Darton Sleeves’ Seal Tight Sleeve Kits

Darton’s sleeve kit maximizes fitment and installation ease.

MAHLE Motorsports Introduces 2023 Porsche Application Guide

MAHLE Motorsport announces the 2023 Porsche Application Guide. The guide offers a complete listing of all Porsche-specific piston kits, offered applications, and features user-friendly sections of Water-Cooled and Air-Cooled listings subdivided based on engine size and application. Related Articles – ProForm Mopar Rocker Arm Kits – KUKA’s LBR iisy Cobot Ready-To-Use Automation – MGP Billet

ProForm Mopar Rocker Arm Kits

MOPAR Emblem Rocker Arm offerings are expanding to include both 1.6 Ratio (LA & B/RB engine families), and 1.7 Ratio (B/RB engines). Features include a roller tip design, internal oiling shaft-to-rocker channel system to lubricate the pivot area, and low-friction bronze bushings; all the same as the popular, high demand MOPAR Emblem 1.5 ratio rockers.

Other Posts

Holley GM Gen-V LT Swap Oil Pan in Black Finish

GM’s new Gen V LT direct injected engines are starting to find their way into a large variety of vehicles. They make great power, plus they’re very durable and reliable. Unfortunately, the factory oil pans don’t always fit or they hang too low for today’s hot rods. Holley’s new LT Swap Engine Oil Pan is

MAHLE Aftermarket Expands Engine Cylinder Head Gasket Portfolio

MAHLE Aftermarket Inc. recently expanded its selection of engine cylinder head gaskets with the addition of new part numbers for Asian and domestic makes and models. For the Asian market, part number 55461 applies to a range of Mazda models and part number 55502 applies to a range of Toyota/Lexus models and are Aftermarket Exclusives

Total Seal Surface System

The easy to use, all-in-one kit comes complete with numerous components.

Peterson R4 Dry Sump Oil Pump

Pumps can be outfitted with numerous options and are suited to a variety of engine applications.