- Lookin' good
- Unless you're going turbo, 3" is WAY overkill. N/A's operate on the principle of EGV (exhaust gas velocity). If you plan on staying N/A; 2.25" is the largest size you want to go on the street (unless you're building a crazy N/A motor and doing track; which which case 2.5" is more suitable).
EJ25 is the general designation for the 2.5L EJ series motor.
- 'tis not backpressure
it's EGV which is required to make power.