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Old 11-14-2013, 10:55 PM   #1
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AFR Heads

I have a 302 with cam, bigger throttle body, pulleys, cold air intake, 24#, and GT40 upper and lower with spacer. Which is better the 165cc or the 185cc?
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Old 11-17-2013, 09:47 AM   #2
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Depends on which cam and your application. Most likely the 165 for street use/ mild mods. 185 is too big.
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Old 11-17-2013, 11:53 AM   #3
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165s for your app. 185s might not even clear the valve reliefs depending on your cam. I'd also take a look at the Trick Flow Twisted Wedge heads. IMO the twedges are the best heads to out on a stock 302.
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Old 11-17-2013, 01:20 PM   #4
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The tf are 170 just between to make you decision easier.if you have the money that's your best bet
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Old 11-17-2013, 02:56 PM   #5
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All the twisted wedge heads say you need aftermarket pistons though?
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Old 11-17-2013, 04:19 PM   #6
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That's news to me.why?you will need harden pushrods,valve springs, roller rockers and gaskets.probably head bolts but never heard anything about pistons
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Old 11-17-2013, 04:30 PM   #7
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I guess if you have a large cam you may have to get pistons.i believe most of the 303 cams are fine
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Old 11-17-2013, 04:31 PM   #8
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I say go afr 165
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Old 11-17-2013, 04:39 PM   #9
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Yeah I'm for sure getting AFR 165's
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Old 11-18-2013, 07:51 AM   #10
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Quote:
Originally Posted by Shifty 5.0 View Post
All the twisted wedge heads say you need aftermarket pistons though?
Only for big cams, nothing that big will benefit a NA 302 anyway. TF sells a whole kit that includes EVERYTHING for a HCI that will bolt right into a stock 302 and put well over 300hp to the rear wheels. Honestly the TF heads are going to make a little more power than the 165s and they give you a lot of room to grow later. Plenty of meat to port them out for strokers or even 351 based builds later on. Not the case with the 165s.

And let the AFR vs TF battle commence!

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Old 11-18-2013, 02:07 PM   #11
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Yeah Iv been researching and it seems like if you get the right twisted wedge heads you'll save more money than AFR and you can make more power and like he said port them too so I'm strongly leaning on the TRICK FLOW side 👍
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Old 11-18-2013, 02:15 PM   #12
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TFS 170cc Twisted Wedge heads are the ones you want.
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Old 11-18-2013, 03:13 PM   #13
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Good call Scotty.you can go up to .550 lift on the tf and like he said they make a kit.i think you would like the results from tf compared to aft and save some $
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Old 11-18-2013, 06:41 PM   #14
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They're the best bang for the buck 302 heads out there. More up top then the 165s, more down low than the 185s, plenty of meat on them to port out if you go bigger down the road and they're cheaper too. Not sure what is not to like...

IIRC they flow 256 cfm at the top. Pair them with a tmoss ported Cobra intake flowing 250 cfm and a TFS1 cam and you've got a solid mean 310-325rwhp street car. That's more than enough to do 11s in a fox.
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