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Originally Posted by violametallic-S-
John,
I hear that the plenum setup is more rewarding than an exhaust system, is it true? What was a more noticable gain exhaust or plenum?
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Here is my take on exhaust and plenum upgrades:
Exhaust setup gave the car more top end improvements in the RPM range where the IPD plenum kit seemed to improve the whole RPM range. I think both upgrades complement each other.
John