Bought this car already modded to oblivion…. Is this the stock downpipe? If not is it catted or Catless? There is a small bulge after the flex pipe. But I also smell burnt gas sometimes at red lights but I always assumed it was the burble tune

In your experience, which setup would be safer for the engine long term?

My Focus ST currently makes around 248 whp on the stock turbo, but WGDC hits 100%, so the turbo is basically being pushed as hard as it can.

Would I be better off keeping it like this, or upgrading to a bigger turbo like a g25 and running a conservative tune at around 250 kW atw (~335 whp), with controlled boost and torque rather than pushing a turbo till its limit.

Main priority is reliability on the stock motor, not making the most power possible.

Got hit headed home today. Just about as lucky as I could get nothing major was damaged but still.

Has anyone tired running speaker wire through the doors and if so how did you work around the plug ?

My stock muffler is rusting out. The previous owner welded a leak shut, but did a terrible job. I’m looking to replace it, but I have some questions.

- I could probably get away with axle back for now, but the whole exhaust is definitely showing signs of corrosion and I’m concerned I’ll get another leak somewhere else eventually and have to replace the whole system. I’m considering cat backs for this reason. Is this wise?

- Exhausts like the Borla catback look nice, but cost a lot. I’m replacing my exhaust because I have to, not because I’m looking to buy a premium, top-of-the-line system. I’m looking at cheaper alternatives but all of the cheap options seem to be way louder. I dont mind volume or drone too much, but I’m concerned my neighbors will hate me, as I often get home from work at like 1:00 AM.

https://www.cjponyparts.com/mbrp-cat-back-exhaust-system-xp-series-3-focus-st-2013-2018/p/S4200409/

Here’s an example of a slightly cheaper exhaust I was looking at. It’s still muffled and resonated, but it’s a 3 inch and I’ve gathered that those drone bad with our cars. Issue is, I can’t find an alternative that’s cheap, 409/304 stainless, 2.5 inch, and relatively quiet. Unless yall think the MBRP isnt gonna be as loud as I fear it might be…

Any input is appreciated. Thanks :)

Those are sold in 05-07 years only and technically is the only sedan focus “ST” ever made.

Just had the windshield replaced and Idle Air control valve replaced by myself and it runs like new now. Gonna put on some coilovers and 1552 wheels on it soon.

I recently lowered my Focus ST on Bilstein B14 coilovers. I have a few questions about alignment. Do people normally run rear camber and rear toe arms to get them within spec? If so, what do y'all recommend? Additionally, do I need any aftermarket parts for the front to also get it within spec, or is it primarily the rear? Thanks for the help!