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Message: [QUOTE="IDIoit, post: 1180318, member: 20130"] pre 99 7.3 have single shot injectors. they fire once per cycle. 99.5-03 7/3's have double shots. (or split shot) double shots fire twice or is it they fire in 2 directions? injector code AA's and AB's both types will run in either engine but you need to flash the CPU to compensate. (its more of a fuel consumption thing) Why would i have watercooled headers you say? this is a marine application. fiberglass melts at alot lower of tempurature than aluminum ;) you need the water cooled headers so you dont warp the boat, take a second and watch the videos i posted of the Mercruiser D7.3. its pretty interesting! the exhaust will be hot! you will never get the temp of the exhaust gasses that are coming out of the exhaust port lower than your foot lets it. but it would be cool on the outside of the engine. like i said, its a marine application. and another 15 grand thrown into a hull into the water :) youre the guy that DIY'd a supercharger to your ps? ive seen the u-tube vids, that thing is super slick!!!! :drool: [/QUOTE]

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