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- - HP gains from MAC's (https://ls1tech.com/forums/generation-iii-external-engine/53096-hp-gains-macs.html)

Onyx Z

Apr 20, 2003 08:54 PM

HP gains from MAC's

What kind of HP gains can I expect from MAC headers and an ORP on a 98 Z28 6-speed? Is there a problem with buying used headers? A friend will give the headers and y pipe to me for $350.
<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

<small>[ April 20, 2003, 08:56 PM: Message edited by: RT98Z ]</small>

DrkPhx

Apr 20, 2003 10:45 PM

Re: HP gains from MAC's

You can realistically expect about 15rwhp. I do recommend porting the primaries and having a Flowmaster collector welded in to maximize the gains.

<small>[ April 20, 2003, 10:50 PM: Message edited by: BLKTA ]</small>

Bull_in_a_china_shop

Apr 21, 2003 01:52 PM

Re: HP gains from MAC's

these days hookers can be had for a low price.
New macs are only $450 so $350 still seems high.

Macs also have a bad rasp!
See if that price an come down

C4VetteLS1

Apr 21, 2003 02:01 PM

Re: HP gains from MAC's

Customers i have dynoed after install have ranged from 15-20 rwhp

Kansas 99z28

Apr 22, 2003 05:44 AM

Re: HP gains from MAC's

you can buy the MAC's off of Thunder Racing for $350 for the headers without the ypipe.

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