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  1. SPD Alpha vs. GESI cat difference

    I already got one on the way. Be here tomorrow. They had 3 in stock when I ordered it the other day. I may do headers next year but not getting that involved this early in to owning it. Seemed like a solid solution for the cat issue with Whipple trucks. I'm going to do a before and after dragy...

  2. SPD Alpha vs. GESI cat difference

    Sorry I'm new to this forum lol... I'm not a big fan of facebook pages and the trolls so I've been jumping on these F150 forums. Just got my 25 truck a few weeks ago.

  3. SPD Alpha vs. GESI cat difference

    Yeah mines a Whipple truck. That's what got me started down this rabbit hole. Thanks for the input.

  4. SPD Alpha vs. GESI cat difference

    I also asked which would be better in a whipple application that was building a lot of heat in the cat.. the response: GESI cats are basically indestructible but for just a basic supercharger and a couple other mods, they are over kill.

  5. SPD Alpha vs. GESI cat difference

    From SPD for those that may be curious: The main difference between the two cats would be the material the core is made of which directly translates into the power they can handle. The Alpha cat has the traditional ceramic core, a pair of them are good to about 1200rwhp. The GESI cat has a...

  6. SPD Alpha vs. GESI cat difference

    Other than the obvious price, what is the difference between the Alpha and GESI cat options on the SPD y-pipe for the 21-25 trucks?




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