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Old 08-07-2011, 05:27 PM   #1
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Default 3.8 and 4.2 interchangeable parts

ive been doin some research lately and i found out that the 3.8l v6 and the 4.2l v6 are very similar (same block etc.). i was wondering what parts from the 3.8 would work just fine on a 4.2? i was wanting to get my truck a little bit quicker for the fun of it, but dont wanna do a complete motor swap
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Old 08-10-2011, 02:55 PM   #2
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If you put the 3.8 intake manifolds on the truck, you can add the 3.8 super charger kit. Super Six Motorsports has the stroker kits to run you up to a 4.3. They also have in stock the CompCams camshafts that will get you a bit more power. They are made for the 3.8 but the only things that are actually different are the cranks (same block, same bore, different stroke). I believe the heads are the same with the only other difference being the intake manifolds. However, 3.8/4.2 parts aren't cheap. In the long run, and engine swap is almost cheaper.
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Old 01-13-2013, 11:35 PM   #3
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This thread helped me alot. I have a 3.8L manifold sitting around. It will be nice to do a supercharger kit with that.
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