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BSutton
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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 stainless steel core that can handle about 50% more than the Alpha cats.
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 stainless steel core that can handle about 50% more than the Alpha cats.
Davidwnuc
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Good info. Thanks
TexasTruck
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Aside from what the SPD website has. If your truck is NA back-pressure and exhaust heat loads will be less extreme than a Turbo/Whipple build. The factory emissions system already handles the 5.0 output pretty well. A CAT/Y-pipe is mainly for improved flow, sound, and longevity rather than massive power capacity. You likely don’t need a “crazy” over-engineered CAT that’s designed for forced induction, unless you plan big power.
A lot of performance shops will opt for the GESi cats simply because they “supposedly” handle higher HP and EGT numbers. Keep in mind a stock 5.0 tune has CAT over temp protection just like the box tunes that Whipple and others provide. Of course the CAT over temp can be programmed out, then going GESi or even CAT-less is probably a better choice if your neck of the woods allows it.
I installed the SPD/Alpha Y-pipe on my Whippled truck for peace of mind. Will it save my engine from a CAT meltdown
I do notice lower CAT temps and quicker cool down after light spirited driving.
There have been some reports of factory CAT failures in NA and boosted setups. The problem is who or what do you believe
Basically, if I was stock, I probably would not invest in the pipes.
I hope this helps…
A lot of performance shops will opt for the GESi cats simply because they “supposedly” handle higher HP and EGT numbers. Keep in mind a stock 5.0 tune has CAT over temp protection just like the box tunes that Whipple and others provide. Of course the CAT over temp can be programmed out, then going GESi or even CAT-less is probably a better choice if your neck of the woods allows it.
I installed the SPD/Alpha Y-pipe on my Whippled truck for peace of mind. Will it save my engine from a CAT meltdown
I do notice lower CAT temps and quicker cool down after light spirited driving.There have been some reports of factory CAT failures in NA and boosted setups. The problem is who or what do you believe
Basically, if I was stock, I probably would not invest in the pipes.I hope this helps…
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BSutton
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Yeah mines a Whipple truck. That's what got me started down this rabbit hole. Thanks for the input.Aside from what the SPD website has. If your truck is NA back-pressure and exhaust heat loads will be less extreme than a Turbo/Whipple build. The factory emissions system already handles the 5.0 output pretty well. A CAT/Y-pipe is mainly for improved flow, sound, and longevity rather than massive power capacity. You likely don’t need a “crazy” over-engineered CAT that’s designed for forced induction, unless you plan big power.
A lot of performance shops will opt for the GESi cats simply because they “supposedly” handle higher HP and EGT numbers. Keep in mind a stock 5.0 tune has CAT over temp protection just like the box tunes that Whipple and others provide. Of course the CAT over temp can be programmed out, then going GESi or even CAT-less is probably a better choice if your neck of the woods allows it.
I installed the SPD/Alpha Y-pipe on my Whippled truck for peace of mind. Will it save my engine from a CAT meltdown
There have been some reports of factory CAT failures in NA and boosted setups. The problem is who or what do you believe
I hope this helps…
TexasTruck
Well-known member
Oh! This is in the 5.0 bucket instead of the Forced Induction… I assumed you were NA… my bad
TexasTruck
Well-known member
Well welcome! You came to the right place. There are a lot of good people here and a lot of knowledge and information. One of the best IMO. Congratulations on your new ‘25!
MJG44
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I would absolutely get the SPD if I installed a supercharger. The peace of mind would make the investment and driving of the truck calm my mind some.
I blew up two past engines in a Lightning I built years ago, for sure have PTSD.
The main reason I won't go supercharged is the risk I cannot stomach anymore at this point of my life.
I blew up two past engines in a Lightning I built years ago, for sure have PTSD.
The main reason I won't go supercharged is the risk I cannot stomach anymore at this point of my life.
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BSutton
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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 comparison. I'm a drag racer at heart so I gotta know the performance difference lol...
TexasTruck
Well-known member
Cool. Word of advice, don’t accidentally drop the new pipes and unless you don’t care about saving the factory Y-pipes, support the transmission and remove the cross member. Also, be aware, not sure about GESi, but the Alpha’s have break in instructions. It has something to do with early heat cycles and sealing the substrate
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