4L80E Tahoe
#12
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They're excellent. I run the 200's since I have boost. The 170's work well with naturally-aspirated Vortec engines. They have stainless valves and enough spring to support 6000RPM. (The PCM will only support 5800.) E-Tec 170's are smog legal - even in CA.
The aluminum will let you advance timing a little bit if you're to tune it.
There are a lot of details to a head swap. I think you should work on the other bolt-on stuff first.
The aluminum will let you advance timing a little bit if you're to tune it.
There are a lot of details to a head swap. I think you should work on the other bolt-on stuff first.
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mitchellmade
Tuning, Diagnostics, Electronics, and Wiring
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09-27-2015 08:27 PM