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Re: mods?
It depends on if they set your boost valve to high from the factory....if you push it down on some L67 it has helped built boost faster..push the valve all the way down and take it for a drive, then pull it all the way up and take it for a drive and you will tell a huge difference in how much faster your boost will build up when you have the valve pushed all the way down..and on the engine mount mod you just turn the rubber mount 90* and it will help with engine movement a little...if you notice there is a gap in the front and back of the rubber mount, by flipping the motor mount 90* the solid top and bottom part of the mount will now become the front and back part now and will help w/ not allowing the engine to move back and forth as much...even if these mods dont help your particular GTP it cant hurt plus its free and only takes 15 minutes to do....
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2003 GTP - Brand New L67 crate engine, K&N FWI, Ported TB, 3.4 s/c pulley, Walbro 340 fuel pump, 180* T-stat, 1.9's, PEM'S, ZZP 3" Down Pipe, ZZP 1.0 PCM, gutted cat, u/bend - resonator delete, magnaflow mufflers and tips.
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