Originally Posted by getsome
An ecm upgrade won't add any hp gains even if I have an after market exhaust, header, and sri?
Not on an SOHC VTEC engine that was built for fuel economy first and power second. Just changing the VTEC engagement point to a lower RPM and dumping more fuel in is going to result in lower MPG and very small power gains. Our cars are pretty much 'tuned' from the factory, so unless you do some serious upgrades you won't get much out of it.