heads and bottom ends

**viinnh** · 28-12-2010 10:11 AM

is this true that aussie model of a D16Z6 head is a D16Y1 head or D16Y8 head

and also is the d15b4 (GL EG) bottom end the same thing as a d15b7 (GLI EG) bottom end ?

**markismaximus** · 28-12-2010 10:47 AM

AFAIK the american D16Z6 is the equivalent of the aussie D16Y1

**viinnh** · 28-12-2010 11:05 AM

ahh okay thanks for that, althought i looked at wikipedia specs thier both different. d16z6 is weaker then the d16y1, vtec cross over is at diffrent rpm's

also do you know if a d15b4 dual carby bottom end is the same as a d15b7 efi bottom end ? d15b4 from a gl eg and d15b4 from a gli eg.

**will13** · 02-01-2011 03:31 PM

pretty sure its the same thing

**dougie_504** · 02-01-2011 06:51 PM

Yeah Z6 and Y1 parts are interchangeable I believe, as well as all their aftermarket parts in case you're looking at USDM stuff...

**mugen_ctr** · 02-01-2011 06:55 PM

i was under the impression Y1 an Z6 are the same, just stamped differently cause of the markets

**will13** · 04-01-2011 08:31 AM

Slightly different sized intake manifold, and combustion chambers. Basically no difference and essentially the same thing

**viinnh** · 04-01-2011 11:31 AM

thanks guy's how about the d15b4 (GL EG) bottom end the same thing as a d15b7 (GLI EG) bottom end ?

**will13** · 04-01-2011 11:42 AM

Yeah, all the same

**viinnh** · 04-01-2011 11:48 AM

since we on the topic of heads and stuff.
are b series and d series "Adjustable Cam Gear " the same ? if not how much are d series "Adjustable Cam Gear "

cheers

**dougie_504** · 04-01-2011 07:25 PM

Originally Posted by viinnh

since we on the topic of heads and stuff.
are b series and d series "Adjustable Cam Gear " the same ? if not how much are d series "Adjustable Cam Gear "

cheers

I don't think they're the same, and the price will depend on SOHC/DOHC and brand mate.