The 400 kit includes downpipes and there all equally difficult to install.
Call Z1 they will explain it all to you.
The helper spring removal gives better feel (according to some ppl here in the forum). Read the in depth DYI s here for nor info. (I would probably just spend the $$$ for a tunable pedal instead though.)
ps. If you've never done down pipes before, you will probably want to take it to a shop. 300 bucks maybe??
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09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix
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