Ferrari was so proud of its five-valve cylinder heads, it changed a naming convention that ran back over 25 years. For its previous mid-engine two-seaters, the three-digit name was derived from ...

Editor's Note: As inanimate as intake manifolds may appear, they provide a path to both major and minor on-track power gains. Selection is one thing; "tuning" them to specific applications is a blend ...

'Breathe in . . . breathe out. Simple respiration is what keeps us alive, and your engine is no different. On a normally aspirated engine, atmospheric pressure pushes air in through the carb, intake ...

The performance of modern spark ignition engines with electronically controlled fuel injection systems may be adversely affected by formation of deposits around the intake valve. The rate of deposit ...

VTEC is an acronym for a variable valve-timing system used on Honda and Acura models since 1989. The full name is variable valve timing and lift electronic control, and the first U.S. model with VTEC ...

Deposit formation on the intake valve of spark-ignition engines is a well known and old problem. The intake valve deposits work like a sponge and absorb the injected fuel during the acceleration, ...

Superior Air Parts issued a mandatory service bulletin (MSB) for intake valves (part number SA539988). The MSB requires replacement of these valves used in Continental 470, 520, and 550 series engines ...

AirMax Intake Relief Valve System manages ALL your pumper’s intake relief valves right from the panel! There is no other intake relief valve system on the market that can set multiple intake relief ...