Join Date: Mar 2008
Location: Kapuskasing Ontario Canada
Mentioned: 7 Post(s)
There is a PAIR (Pulse Air Injection Reed) valve which admits air from the airbox to the exhaust ports when closing throttle at over a certain rpm and under engine-braking, to reduce emissions and to help protect the muffler's catalytic converter. It has no effect on power and driveability, but is sealed off to reduce backfiring tendency with an aftermarket low-restriction silencer...
Last edited by invader; 08-03-2009 at 05:44 AM.