Originally Posted by i2cou4u2
I am thinking of doing this so I don't have to mess with building a custom downpipe
Its not that hard or $$ really!!
Trust me try the stock twin-scroll before you research an upgrade, its actually a great DD turbo.
Quick story, when I first did my swap, I logged the car on Shell 93 and can verify you get way too much knock. Through sharing knowledge and making friends on the site, I was given a several AH581 maps made by Clark
. (Hey this is a good ad so
) I slightly modified one of those to run safe till I was able to complete my mods and go for my final tune. I can vouch that from my real experience that Clark's advices and tunes are dead on when dealing with these ej207's.