The stock bypass valve uses a plastic
valve which will make a honking sound when boost is increased, it is also
insufficient to relieve pressure during shifting. The new valves claim an
increase of 2-3 horsepower, but the purpose of this upgrade it improve
boost levels during shifting. The Forge valve will hold high pressures
better and will relieve them at a higher rate than the stock valve. This
is the valve of choice for most Saab upgraders.
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www.Stratmosphere.com - Cost: $140
Time: 15 min
Difficulty: Easy |
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