Posted By Gsubie14 on 30 Mar 2016 05:05 PM
FIRST thanks guys i am using cobb stage 2. I am on street tires regular gas. Also my downpipe is catted. Guess I will ask the guys here but are we saying I may be in STU?
Cobb used to offer STX/STU legal OTS (off the shelf) maps for 02-07? WRX/STI, but doesn't anymore for the newer models as far as I know.
A Cobb Stage 2 map directly modifies boost parameters and is not legal for STU. Maybe your local region has other classes, or maybe your local competitors would not mind if you ran STU as someone said. But as-is, according to the rules, that puts you in ASP or SM.
You can do a catted downpipe in STU, but there are some requirements. See below for some relevant rules.
Besides a custom dyno tune, there are e-tuning services out there that could do an STU-legal map for you.
"..no changes to standard boost levels, intercoolers, or boost controls are
permitted. Boost changes indirectly resulting from allowed modifications
are permissible but directly altering or modifying the boost or turbo controls,
either mechanically or electronically, is strictly prohibited"
"Any catalytic converters are allowed, but must attach
within 6” (152.4 mm) of the original unit" ..." Replacement converters must have a minimum catalyst density
of 100 cells per inch and minimum substrate length of 3” (76.2 mm)"