Here I go again with old school.
I was taught that: One mod by itself won't make a big diference but if you combine it with other items, the performance increase will be biger. for example: If you increase boost, remove intake restrictions and increase fuel flow, where would the bottleneck be? In the exhaust. Once installed, you will se a big improvement.
On the othe hand, If you just install the exhaust and don't do anything else to the engine, your HP increase will be very low.
$0.02
Ian
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