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All VR6's should have 268 cams! I had them in mine and it was the best money I ever spent on that car.
I've never really thought about cams. Its there a big peak power increase, or is it just a better hp curve? I remember I looked ito them for my e30 when I had it, and it didn't seem worth it for that car. I will check it out though.
If I remember correctly from when I had my cams, peak increase with the appropiate software is around 15whp. Not huge but noticable. The power band gets much more broad and you make a lot more power up top however. I recall seeing several dynos with vr6s running cams and at 6500rpm there was something like a 25whp difference from stock, so the top end is much improved.
Thats when I did mine. The idle stays smooth but if you have an exhaust or the suitcase muffler taken out, then you can definitely hear a bit of a burble in the idle through the exhaust.
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