2017 Kona Blue ST1
I won't speak to HP, but I will say that next to a new more efficient intercooler a replacement downpipe (even with a catalytic converter) will always be second on my suggested upgrades list.Thanks Monster. Will do,
I wish someone had a dyno with just the diff between a stock DP and a high flow. I looked at the size of the turbo and even if there is a flattened bend it should flow enough. Surely not 15-20 HP worth.
Do I just have an incorrect preconceived notion?
The overall reduction of drive pressure and subsequent exhaust reversion will always be a benefit to you ST. The engine is nothing more than a mechanical pump at the end of the day. Running elevated boost pressure levels on a small turbocharger like the K03 will need all the help if can get.
Better flow = more exhaust output, better cylinder scavenging, & a reduction in EGT (as long as someone doesn't fatten up the AFR that is).
Fancy air intakes and cat-back exhausts are in the beginning purely cosmetic. Later on you will gain more power with them but only after the other systems have been upgraded and properly tuned.
A good quality DP that isn't beating on anything causing false knock is an excellent upgraded for the longevity of the engine.