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Personally if you’re going to do the exhaust manifold and cat back I'd replace the down pipe as well. There is just no good reason not to replace it all at once. Also I'd see about getting a manifold from maybe another member who owns an LSJ that has replaced theirs with a header, just for cost sake. BE WARNED, some people like the 2.4 intake swap, some don't. The problem is it moves the power band higher up in the rpm range. Instead of peak power at 4000 rpms it peaks at 6000 rpms if I remember correctly, Crate Engine Depot has the dyno sheet posted. I'd suggest you look at it and ignore the HP numbers look at the TQ curve and think about your every day rpm range. My suggestion is if this is your every day driver, don’t do the swap it will just cut the low end out of the car. The short throw shifter from TWM was the first and is the best thing I have done to my car.
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2006 LS coupe, manual, Victory Red
Sportlines, FE5 struts, shocks, front swaybar, Progressive 22mm rear swaybar, Airlift load assist rear airbags, TWM ST shifter, smoothed TB, LSJ exhaust, debadged, demudflapped, Yokohama AVID Touring P195/60R15's. Soon to come 17x7 Motegi Tracklight 1.0. Best to date 15.402 at 90mph
"No friend ever served me, and no enemy ever wronged me, whom I have not repaid in full."
Lucius Cornelius Sulla
Last edited by Montecarloman; 01-14-2008 at 05:54 PM.
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