{big-name trash tuning} intake/exhaust manifold issues? anyone?

[marek4792]

Gonna say the quiet part outloud, your friend is running that tuner box that will melt filters really fast and absolutely destroy everything downstream especially if you lost injector which sounds like you have... Intake manifold is a waste of $$$ and creates an air flow imbalance, although there's another aftermarket that migates this on paper... Exhaust manifold is subjective as it may or may not help slightly cool your EGT 25-50° at best and flow to the turbo slightly better, not that you'll notice it in an on highway application... All in all, most as in 90% of aftermarket is designed to rip you off.. Now thats aside you need to make sure you didn't cook a set of injectors and who knows what else...