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What Heads for my 402?

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Old Aug 28, 2025 | 11:56 AM
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Default What Heads for my 402?

So i'm planning on doing a 402ci kit for my ls2 with the boost district lsa blower kit, I wanna use BTR’s PDS stage 4 Cam(229/25X, .636"/.636", 116 LSA) kit but i'm stuck when it comes to choosing the heads.
I could do something like PRC 247cc heads and use the cathedral to square port adapter the kit comes with, but id prefer to use square port heads but i don’t know much about square port heads n whats good. Looked at just ported ls3 heads but wanted to know if theres a better option for this kind of setup. Not too worried about price, I just want everything to work together properly.
PS. I do plan on sending the blower to kong and doing their x port or maybe doing their 2650 later down the line, and would prefer to not have to swap out the heads again later on.
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Old Aug 28, 2025 | 07:27 PM
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Depends on what power level you want, I guess.
I'm on a stock LS2, stock intake, cam etc with a super charger and meth making 690hp. That's sufficient for now with this rear end and tire combo.
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Old Aug 28, 2025 | 08:25 PM
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According to Eric Weingartner AFR ls 3 mongoose are the best flowing LS 3 heads out there.
I’m thinking you’re looking to make the most power you can.
I would look into a set of them.there a video somewhere showing them to out performing 255x TFS
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Old Aug 31, 2025 | 01:27 PM
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Afr!
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Old Sep 1, 2025 | 01:30 PM
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I'm using LS3 Mongoose on my 6.0 with 227/ 236 114 cam. probably a bit too much head for my application but I think it would be ideal for you. I race with a guy that has the the Frankenstein heads & they are IMPRESSIVE
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Old Sep 2, 2025 | 09:25 AM
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I would definitely not stay cathedral at all, if you're upgrading heads then you might as well to rectangular port. i would suggest the smeding performance 273 heads, I've go those in my 408 and they looked amazing
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