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Old 09-07-2013, 12:52 PM   #19
owndjoo
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Join Date: Aug 2012
Name: Drew Brenn
Location: Delaware
Car: '98 M3 sedan TV
Posts: 105
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Texas speed is who I ordered EVERYTHING from when I built my z28 vert last year. PRC ported 5.3 heads tighten up the squish(chamber size) and bump up compression. These are the must haves for n/a builds especially if you are going with like a 224 or 234 style cam. I had a set that were milled to 59cc chambers (11.5:1) but my ms3 cam needed fly cut pistons. I suggest double over beehive springs for peace o mind. Depends on cam size though. I've only ran .600+ lift
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'98 Techno Violet/Schwartz M3/4/5
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