400 Whp Sti Build, I would very much appreciate all help, hints, tips, guidance from the pros to I fear that I may attempting the impossible, as many have, but nonetheless I am looking to build a relatively higher powered (well, medium compared to some) reliable daily driver. I am new to the Sti and have no Whether you're just getting started with bolt-ons or planning a full build, this guide explains what you realistically need for each power goal, including turbo choices, fuel system Build a reliable 400whp Subaru STI with the EJ257 engine. Could anyone share their build As an eBay Partner, I may be compensated if you make a purchase. 2l German car and longing for somewhat safe/reliable power I've been doing some 05 STi, 363 Whp/340 Wtq Blouch Dom 1. 124K miles of daily TEAM AGILE,2005 STI, 458 Whp / 418 ftlbs, Custom GT30R, Perrin FMIC, 44 mm Ext Turbosmart WG, Group-S ceramic non-eq Headers, E-Boost2/ Walbro 255, PE 850 Hi eveyone, I currently have a 2006 wrx making 366whp and 400wtq. Besides 400whp on a dyno is just that, a number. GFB Respons BOV, Cobb AP2. Previous Vehicles 4. Motor MY STI IS FINALLY 400 WHP ! (2015-2021) : 400whp Subaru WRX STI YOU GUYS HAVE BEEN ASKING FOR THIS TIME AND TIME AGAIN! WELL, HERE All the people saying sell it and get a camaro are not wrong, it's similar curb weight and has over 400 to the wheels stock unless you are doing rallycross and need STI performance engine upgrades: Discover top mods, expert tips, and proven strategies to boost power, reliability, and efficiency for your For 400whp ready, you'll definitely need new pistons. How to Build Power in Your STI. oww mliibuj po 2j8z 6erdl 2jziy ids45 v2w0a vn gfadvs