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goinbroke2 · 12-29-2017, 01:01 AM

The way I read it is, if I run stock heads my hp is “X”. If I run aftermarket head pn1234 than my hp is “X” + 5. The reason I am adding 5(or however much) hp is because that is what these heads are deemed to be worth with their ports/valves/chambers/etc.

I think the difference from stock is acknowledged in the increase of hp.
What sbf has been approved for stock? Gt40p heads at +5hp? I’ll go for that thank you very much! Lol.

12-29-2017, 01:01 AM	#49
goinbroke2 Senior Member Join Date: Mar 2002 Location: NS CANADA Posts: 884 Likes: 1,567 Liked 381 Times in 148 Posts	Re: End of year HP The way I read it is, if I run stock heads my hp is “X”. If I run aftermarket head pn1234 than my hp is “X” + 5. The reason I am adding 5(or however much) hp is because that is what these heads are deemed to be worth with their ports/valves/chambers/etc. I think the difference from stock is acknowledged in the increase of hp. What sbf has been approved for stock? Gt40p heads at +5hp? I’ll go for that thank you very much! Lol.