Engine Breather, Vacuum, and Seals

Peterson has a variety of products for your engines breathing system. We have breather, regulators and seals for your engine.

Direct Screw-In Breather

-12 AN male thread to screw directly into the breather bung on Peterson Dry Sump Tanks. Can also be used on engine valve covers as a fill plug/breather, when a -12 AN port (Part# 987112) is welded into an aluminum cover. 1 3/8" OD on tube. Includes bung and filter.

08-0415 Breather with filter and -12 AN Weld Bung

One Way Valve - Pop Off

Breather assembly is installed on engine's crankcase in vacuum condition. Valve seals engine from air entering engine, but opens in the event of crankcase pressure, allowing crankcase to vent. Comes complete with -12 AN bung, to weld to aluminum valve cover, and filter.

08-0450 Pop off valve with filter and -12 AN Weld Bung

One Way Valve - Inline Pop Off

Breather assembly is installed in line from engine's crankcase. Valve seals engine from air entering engine, but opens in the event of crankcase pressure, allowing crankcase to vent.

08-1450 Inline Pop Off -16 AN

Vacuum Regulator

Peterson's new adjustable vacuum regulator is on the leading edge of engine management. It has been proven to regulate crankcase vacuum and hold a steady level through extensive testing. Vacuum can be regulated from as high as 29.7 in/hg down to 2 in/hg. This regulator is machined from Billet aluminum and features the same great quality as all of Peterson's products.

08-0455 Vacuum Regulator w/-12AN Bung

High Performance Engine Seals

Peterson Fluid Systems now carries these quality seals from TKO Competition Development. TKO's "original" Teflon seals are designed for engines running crankcase vacuum and insure the highest vacuum levels. This is a great benefit to dry sump applications. A diagram and instructions are provided for installation.

Rear Crank Seals

SM86410 Small Block Chevy 400
SM86625 Small Block Chevy
SM86665 Big Block Chevy
SM13610 Ford 302
SM85339 Ford 351
SM85742 Ford 351 w/302 Crank
SM87123 Mopar R3 Block

Front Crank Seals

SM86990 Small Block Chevy
SM86910 Big Block Chevy
SM85338 Ford 302/351
SM85339 Ford 351 Yates Drive
SM86997 Mopar R3 Block

Distributor Seals

SM86417 GM MSD Distributor
SM86320 Ford MSD/Moroso Distributor

Jesel Front Cover Seals

SM86587 Small Block Crank (Jesel # SEL37200)
SM86622 Big Block Crank (Jesel # SEL37200)
SM80000 Cam Seal (Jesel # SEL38000)