This past weekend i installed my stage 3 clutch flywheel test pipes and downpipes. the car is awesome now! The only issue i am having intermittently is if i try to do a long pull on the highway. It boosts hard and pulls fine until about 5k rpm, then you feel the engine die out for about 2 seconds then comes back alive for about two seconds. Almost feels like you are hitting a speed limiter. It does this from 2nd to 5th gear. i re-gaped my plugs to .035 and this is not seeming to cure the problem. compression is fine on every cylinder. No injector failures. I'm wondering if it may have something to do with the ptu?
