Headers or tune first?

[iwdav]

I have some catless LTH waiting to be installed and im wondering if i need to get a tune first or put the headers on before i get the tune?

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[shogun32]

catless LTH do basically nothing for power so the tune can come after. Plus why bother with an initial tune round-trip that accomplishes nothing?

 

[NGOT8R]

Install headers and any other performance mods that you may be considering and then tune it.

 

[AZ18yote]

Mods then tune for said mods. Tune for e85 at the same time if available in your area. Completely different vehicle at that point.

 

[NightmareMoon]

A tune on an otherwise stock car probably won’t make any more power anyway.

install the headers, then tune.

 

[2022 Mach 1]

What kind of power gains are coming from LT? This is my first s550 so still learning jwat works and what doesn't vs my 2014.

 

[Mspider]

not sure why you would want to have to go through the hassle of retuning.

 

[shogun32]

What kind of power gains are coming from LT? This is my first s550 so still learning jwat works and what doesn't vs my 2014.

LTH without forced-induction does nothing. E85 makes a difference but you don't need LTH to see those gains. Basically it's a complete waste of money unless your goal is unbridled noise or a change in the timber/tone of the noise. Which of course mufflers influence heavily as well.

Or you LIKE the stink of unburned gas and other nasties the CATs take care of.

 

[Zrussian13]

Lth and e85 tune for a solid NA combo.

 

[bonz50]

catless LTH do basically nothing for power so the tune can come after. Plus why bother with an initial tune round-trip that accomplishes nothing?

que?

 

[NGOT8R]

Things like a CAI, mid pipes, and axle backs are all great complements for a car with LTHs. If you do decide to go that route, don’t forget to tune for E85 and really wake your ride up.

 

[Tom@Lethal]

Just do everything and then get it tuned after the fact. Yes you can do it in increments and get revisions but if you’re outside a certain window (depends on the tuner) it will cost money for a revision. So plan ahead, get the parts installed then let your tuner know what mods you have so you can kill 2 birds with 1 stone. If you need any help please let us know.

 

[dx2]

If you have the part already it makes sense to install first then then tune.
Usually I'd speak with a tuner first and explain what you want to achieve exactly before buying anything because they know all the options and combos and can recommend suitable parts for the intended target.

 

[FruityJudy]

I thought cat deletes were good for 10-15 hp? I was thinking there are little gains between cat deletes only and catless longtube headers.

 

[Mspider]

I thought cat deletes were good for 10-15 hp? I was thinking there are little gains between cat deletes only and catless longtube headers.

Not everyone is after just gains though. Personally I would never run cat deletes. I would do high flow cats.

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