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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 01-09-2014, 12:32 PM   #1
allmotor
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TFS GenX 255

I'm looking to upgrade stock heads to GenX 255. Anyone have an opinion either way?
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Old 01-09-2014, 01:01 PM   #2
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According to 3 Vendors they are junk. Probably want to look into WCCH.
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Old 01-09-2014, 01:13 PM   #3
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According to 3 Vendors they are junk. Probably want to look into WCCH.
I just read a thread regarding the 255's and Anthony at LG chimed in. I will not be getting them.

Heads are the last bolt on for me and my car is basically a weekend driver. I'd like the heads to compliment my other bolt ons (see sig). I realize the bang for the buck is not there, but that doesn't matter to me. Just want to install complimentary upgrades.
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Old 01-09-2014, 02:26 PM   #4
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I've had WCCH heads and PRC heads. Both good choices!
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Old 01-09-2014, 05:51 PM   #5
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I have PRC 255s and I love them. I agree with the others, either Advanced Induction, PRC, or WCCH.
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Old 01-09-2014, 11:23 PM   #6
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If your staying NA consider milling the head a lil depending on your cam specs to bump compression a bit. Prc and TFS heads will allow you even more room for bumping compression due to their different valve angles. Compression = free hp/Tq
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Old 01-10-2014, 07:26 AM   #7
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If your staying NA consider milling the head a lil depending on your cam specs to bump compression a bit. Prc and TFS heads will allow you even more room for bumping compression due to their different valve angles. Compression = free hp/Tq
I am staying N/A and I'm contemplating swapping out my cam ((227/235 .614/.623 114+4) for a cam that will take the most advantage of which ever heads I decide on.
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Old 01-10-2014, 08:36 AM   #8
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According to 3 Vendors they are junk. Probably want to look into WCCH.


What are they saying makes them junk? The early stuff I saw on them the customers were quite pleased. I'm considering these heads myself and would like more info. Thanks
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Old 01-10-2014, 09:53 AM   #9
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I am staying N/A and I'm contemplating swapping out my cam ((227/235 .614/.623 114+4) for a cam that will take the most advantage of which ever heads I decide on.
Call Martin at Tick or Brian Tooley racing and exploit the crap outta those heads.
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Old 01-10-2014, 11:02 AM   #10
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What are they saying makes them junk? The early stuff I saw on them the customers were quite pleased. I'm considering these heads myself and would like more info. Thanks
I have them and i feel they worked great. 549 rwhp and 538 rwtq. The vendors that have had bad things to say about the heads do they sell these heads or is it we dont carry them so we dont reccommend them.
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Old 01-10-2014, 11:09 AM   #11
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I have them and i feel they worked great. 549 rwhp and 538 rwtq. The vendors that have had bad things to say about the heads do they sell these heads or is it we dont carry them so we dont reccommend them.
Nice numbers tell us about your cam and build setup if you don't mind.
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Old 01-10-2014, 12:47 PM   #12
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I have them and i feel they worked great. 549 rwhp and 538 rwtq. The vendors that have had bad things to say about the heads do they sell these heads or is it we dont carry them so we dont reccommend them.
Are those N/A numbers? If so I want your formula. That's the kind of numbers I'm looking for.

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Old 01-10-2014, 03:41 PM   #13
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What are they saying makes them junk? The early stuff I saw on them the customers were quite pleased. I'm considering these heads myself and would like more info. Thanks
http://www.camaro5.com/forums/showthread.php?t=336021
Here is the thread with installer and vendor reviews.
Junk was a strong word but they have valve issues that I don't care for and when a installer only makes 19HP then pulls them off and bolts a set of ported stockers on and makes 30hp for way less money that is enough proof for me.
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Old 01-10-2014, 04:47 PM   #14
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But I thought one of the vendors got 490rwtq at 3,100 rpm with those heads!!!???
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Old 01-10-2014, 05:46 PM   #15
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I'm looking to upgrade stock heads to GenX 255. Anyone have an opinion either way?
Let us know the results (HP).
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Old 01-10-2014, 06:32 PM   #16
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I'm going to watch what these do. Seems from the threads linked and the ones they linked to that there were a few opinions about them. A lot of the anecdotal stories were about other heads too.
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Old 01-11-2014, 06:57 AM   #17
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Let us know the results (HP).
Based on info gleaned from several threads, I'm going to go in a different direction regarding TFS.
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Old 01-11-2014, 08:31 AM   #18
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^^ this guy that made 549hp was on a 429. Not that impressive
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Old 01-11-2014, 09:16 AM   #19
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^^ this guy that made 549hp was on a 429. Not that impressive
Matt is going to be doing the heads install and he recommended the TFS heads. I'll be seeing him next Tuesday for a suspension issue, so I'll run this thread by him.
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Old 01-11-2014, 09:20 AM   #20
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You know it wouldn't hurt my feelings to get some Lingenfelter ported heads. The TFS work out to be about a grand more. I figured it would work out a little more to get them and sell my LS3 heads. Maybe $500 more for what are supposed to be better heads.

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Old 01-11-2014, 09:23 AM   #21
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Need more research before just labeling them junk. For six bolt heads they may be a good option. Obviously stock ls3 heads aren't 6 bolt.
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Old 01-12-2014, 04:25 AM   #22
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Need more research before just labeling them junk. For six bolt heads they may be a good option. Obviously stock ls3 heads aren't 6 bolt.
Junk was a strong word and I apologize TFS(I know you make OTHER great heads) but there are two other aftermarket LS3 castings that are 6 bolt heads(MAST,PRC) that don't have the same issues. 3 more if you count GMPP LSX LS3 6 bolt heads. I really wanted these heads to work out but the valve issue alone would have me steering clear. If TFS offers a factory hollow valve stem option and fixes some of the issues while making more power than a ported stocker then we can re visit the conversation. One thing to think about is even if you get hollow valves for the TFS heads they are still going to weigh more than LS3 hollow valves.
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