I am kicking around the idea of getting a LS6 head, either the factory job or the Holley/L-felter LS1 aluminum one. Anybody have one? Notice a difference? Thanks for the info.

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1999 Z-28 M6: Gran.MAF, LS1 MoSports intake, K+N filter,Corsa exhaust, PowerSlot rotors, Hoch. strut tower bar, still working

 

By "head", I mean intake mainfold. Sorry.

 

I havent seen too many cars with untouched engines pick up much, maybe 5 HP, which seems low for 500 bucks to me. If you had heads/cam or at least cam you would probalby pick up a decent amount. I would go with headers first.

 

Rog-o. Thanks

 

Stock LS6 heads probably would not give you much of a gain.

Our GM sponsor over at www.ls1tech.com has provided a lot of info regarding the GM CNC LS6 heads... Now THESE heads are making some power! They are like $1800 for a pair of them...

I am putting on some ARE Stage III LS6 heads (11.7:1) on my 422ci iron block hopefully my missing MPH will be found.

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1998 Formula | ARE 422ci iron block with Stage II heads | 40 lb Injectors | LS6 Intake | TTS headers | 3" ORP | Mufflex 4" Catback | MSD Wires | Whisper lid | SLP MAF | FLP level IV 4L60E | Yank TPE4400 | Moser 9"/4.10's | RT Torque Arm | HAL Shocks and Springs (front) | V6 Springs (rear), Alston 8 pt Rollcage | Airlift Airbag | Weld Prostars | ASCD Hood | 11.15@120.30mph 1.53 3625 raceweight LS1TECH.COM