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Did you just weld the GESI's in near the stock cat location?

What gear did they dyno in? Your power seems about right (470-475whp for A10s with longtubes and E85 vs 485-490 for manuals) but torque seems low. Should be more like 430-440

Driver's side manifold is welded to the cat, you'd have to cut it (ala MAK Cat Deletes) and weld a flange in. Based on the pictures below, I'd say a 3 inch Vibrant 2-Bolt Flange would be appropriate. Read the MAK instructions at the link below and it will give you more info as the cat inlet is...

@LETHAL Curious why these are so much cheaper than the Kooks headers despite the extra coating, can you clarify?

@LETHAL are these coated on the inside also by Jet Hot or is this only an exterior ceramic coating?

Has anyone had issues with cracking due to how thin the injector boss areas are and some other sections that are ported, after torquing stuff down and heat cycling the plastic by driving a bunch etc? They look almost wafer-thin vs the 1/4" to 1/3" or more thickness stock.

Looks about right then. Should be 480-490 easily with E85.

Got it, thx. Is that an A10 car on E85? Curious what other mods are done with that comparison.

Yours is a 15 though right? Not an 18+

I had mine welded in at a muffler shop, they arent meant to clamp in. Find someone with stainless weld wire or have it tigged if you want it to look fancy and last a bit longer.

Beef got any dyno sheets of the before/after on a 2018+ with the swap besides the one AFS posted showing like 16whp?

This is on a 15-17 with their sub-par manifold in comparison. I'm talking 18+ GT with a ported manifold over the stocker.

He is bone stock on the intake except for opening up the grille with a dremel to get more airflow into the stock airbox. Ported manifold is in discussions now to eek it over 500whp. His is a 6spd manual not an A10. Mine is an A10 though :)

Just sharing my buddy's dyno from his 2019 GT with a 6spd manual, Lund E85R tune, SP longtubes w/high flow cats, factory connect running to a 2.5" full catback. Good power, and SAE with reasonable smoothing. He ran 430whp stock fyi on the same dyno and in SAE.

Just curious if anyone has third party dynos of an Airflow Solutions Ported 18 manifold on a 2018+ GT (auto or manual) from a 3rd party, besides the one AFS posted on Facebook. Curious what folks are seeing. The VMP comparison was a ported 18 and stock 18 on a 15-17 GT, not an 18+ fyi so that...

Yes indeed. Go with Vibrant TurboFlex sections, 8" or longer, one per side. Zero problems after!

@Mod Mustang Racing any thoughts on the oil cavitation (typewriter) tick and piston rattle for the 18+'s, regarding if in your opinion those should be considered durability concerns?

Nice, sounds good!

So no videos before and after with these?? :( Would love to hear them.

Nope all stock, just was checking with others