Anyone have an independent dyno from any of these mods??

 

Actually, not quite true. There is a size difference, but certainly not as large as you posted. ISF is 60mm (2.36") RCF is 65mm (2.56"). Note, my LTEL PPE Headers on my ISF has the 65mm outlet. 3" outlet on each side would be too large for a 5 llitre NA engine.

Lou

 

A lot louder and a lot smellier !

 

I don't understand why you guys are blasting sikky about their numbers?
Different dynos get different results with the same car. Even stock rcf horsepower varies from car to car.
The way he dyno'ed the car after each mod, imho, is the right way.
They isolated the baseline, then headers, then exhaust gains.

Ok some of you don't "believe" in their claimed hp gains, nothing wrong with that.
But all they can do is present to you what they find based on the dyno they're using.
The difference in the gain from base line vs new mod is what we are all interested in. Not their claimed peak hp.

Even if the headers don't gain 45 hp, and you only get 40 or 30 something when you install it, that's life.
IMO that's pretty good from a bolt on part, especially if there are low end and mid range gains which is where our cars need.
My 0.02

 

They did post this in the IS-F section also but to clarify, the baseline is WITH the RR-Tuned air box and Titanium Intake with Tune. That's why the gains with the headers was a little more than anticipated. If anyone is questioning the final result of 425whp let me tell you that that number is very close to several FBO IS-Fs. Mine may be outshining them by a few horses or so because I put BG44K prior to my trip to SIKKY and I got a fresh oil change so that could account for 5whp I guess if people make it that much of a big deal. Are we all one-uppers here?

I want to say though that the hostility towards SIKKY is really unwarranted. They aren't PPE but competition is always a good thing.