Yeah 41-110 iridium NGK is OE. Cleverly manufactured by NGK then rebranded in ACDelco packaging.
Colder 41-104 preferred for boosted applications as they're OE in ZR1, CTS-V et al.
http://www.amazon.com/ACDelco-41-110-Professional-Iridium-Spark/dp/B002I0GYZU
Oh Sweetie, I picked up ~1.5mph and decreased ET by .10 at Fontucky with A/B/A testing.
You and your results?
Let's have a go I'll show you how well my combination works.
XO
Airaid is the best for proven power and least expensive. If ~$150 is beyond the budget other hobbies beckon.
GM saw fit to include a 'CAI' and unrestrictive box as OE or didn't you notice?
http://www.gmfullsize.com/threads/bbp-independent-intake-test-results.255801/
No thanks. Wouldn't want to put you out.
In spite of your "Professional 2-Way Tuning For Street, Race or Offroad" offer I elected to go with Black Bear.
The results have been outstanding and he's a fine gent.
I used a floor jack and ratchet strap to lower the exhaust enough (~1/2") for the pan to clear for R&R.
Quick and easy. :)
http://www.performancetrucks.net/forums/gm-drivetrain-suspension-22/6l80-atf-diy-534546/
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