So pumped to see these results. Giorgio has been sending me examples of what he calls their VF58 on steroids haha. Still don't know if a custom VF58 is the same as a true VF58 in the OEM+ game haha.Sorry to disappoint! I have all of the parts now, just need to order the wideband O2 for tuning. I plan to do the install in two phases:
1) Install the turbo & tune on stock injectors (will max out IDC).
2) Upgrade injectors & install flex fuel kit for E85.
I plan to do the first round of calibration myself via road tuning. I will rent some dyno time once I upgrade to E85 for torque optimization since I won't be knock limited.
I also plan to do a "lag torture" test with the VF48 & VF58 to measure the lag time to peak boost & torque.
This is what I plan to do. I love the Cobb Downpipe with Gesi Cat. Having that visual EPA number on the cats may help get through visual inspection one day if needed. I am gunna buy a twin scroll bell mouth head and have it welded onto my Cobb DP. OR, see if I can just get away with cutting the flange off the cobb dp and welding on a TS flange.I have an OEM S208 downpipe for now. I want to do a "stage 1" comparison of the VF48 & VF58 first. I also live in California so it'll be helpful to have the OEM downpipe available.
As for aftermarket twin scroll downpipes, the Moore Power "TruDivorce" downpipe was the best design that I've found. I wish that there was a JDM equivalent COBB GESi downpipe because I really like their cast bellmouth and GESi cat, but I haven't found anything comparable. The other option is to buy an aftermarket single scroll downpipe and use the Kinugawa twin scroll "lost wax" cast bellmouth.
It may become harder to find downpipes (in general) with the recent EPA crackdown.
Honestly, I still haven't decided what I'm going to do. I spent so much time researching the parts required and sourcing them from Japan.. and then there's the actual money I've invested 😂. It took me over a year to just source a VF58, they're nearly impossible to find. I will definitely keep you in mind. If I sell, I want it to go to a good home, someone like you that truly appreciates rare JDM OEM+ parts.
With the OEM VF58 turbo, rebuild & upgrades by ASEL, porting & ceramic coating by SoCal Porting, OEM S208 header & downpipe/frontpipe, misc brackets, coolant hoses, oil lines, nuts/bolts, fittings, etc... I have at least $5k invested. Most Subaru enthusiasts that aren't addicted to OEM parts would consider this is insane and say that you could buy a COBB 20G or Blouch DOM 1.5 XTR for so much cheaper.
For struts/springs, I've been debating on either the S208 Bilstein DampMatic II struts & STI pink springs or the Ohlins. The Ohlins aren't OEM, but they're nearly the same price and will ride/perform better. The only downside to the Ohlins (as with all coilovers) is that they will need to be rebuilt eventually. Both options will offer improved performance and ride quality. I just feel that the Ohlins are the better option in both performance & value. The S-series stiffening bits are definitely a must have!