flowrider

iTrader: (9)

Well, I'm a bit skeptical. Every other Dyno Chart I've seen has peak Torque coming in @ about 5100RPM and peak HP at about 6K RPM with power falling off after that. This curve is quite atypical. Peak Torque @ 5600 RPM and HP going all the way to 6900RPM, when the stock ISF has a cutoff @ 6800RPM.

I've attached two attachments. #1 is the graph I've pulled from the video. #2 is an overlay of an old dyno of mine with the Sikky graph.

Lou

GR8WHITE

From what I'm told, Sikky worked very hard for a long time to develop a design that would allow 1 7/8" to fit in the already limited space in the isf engine bay. This is the likely reason that size hasn't been done until now.

And yes, the dipstick has to be relocated.

Lou, I get your skepticism, and there will always be never ending debate when it comes to dyno charts. It's very difficult to compare results from different dynos, on different cars in different areas of the country. Best that can be done is back to back dyno runs with close to the same conditions as possible with the new headers being (mostly) the only variable.

Either way, I'm sure there will by more dynos for these to look at soon to see if the results are consistent.

FFM

I don't think it's weird at all to redevelop your product after some new advancements in the chassis (tuning) have become available. If anything more power to them for even bothering when the existing product technically functioned just fine.

Curious to see retail pricing.

flowrider

iTrader: (9)

I certainly agree, but the curves look so wrong compared to what I have seen in the past.

It also shows the new Sikky header actually making less power up to 6300RPM when it starts to pull ahead. This would mean less performance in the area where it's most needed. And how does it rev past the redline?

Lou

minator

Aren't dyno jets notorious for difficulty in getting proper rpm readings? I wonder if the tech entered it wrong. It just looks like the entire curve is shifted to the right.

MWIS350

Sound mean as hell for the price and 45 go gain is worth the money 👍👍

BS ISF

track times are the only true measurement!!!

Alizia

iTrader: (1)

That sounds killer, too bad we don't a direct comparison between these, the old headers, PPE, and EL. I guess it's a matter of which ones sound the best.

GR8WHITE

I hear ya! The RPM points look somewhat funny to me too, especially compared to your plot. But that also applies to the curve with the stock manifolds. If just comparing the before and after curves, it's hard to argue there is a VAST improvement. Dyno numbers are cool and all, but I'm having more fun destroying my the remainder of my tires. I might add, the car sounds nasty doing it too!

caymandive

iTrader: (2)

Nice gains GR8WHITE! Though I don't have actual dyno sheets myself (still waiting) with these new headers on my car, I have seen them and the car is making more power (more so top end) than the original headers. I can say that with SIKKY having had my car for nearly a year, they didn't rush anything and the new headers have been proven both in house and at a third party to produce more power than both the original design and the current PPE headers. Quality control complaints have all been addressed from the past and everything about the header improved upon. Not only that, but I believe it was the goal of SIKKY to have the "best" headers on the market.

With all that said, I too don't like the dyno graph posted by the OP either as it does look off in the rpm points, but the gains are certainly there shown before and after, just not in anyone's best interest to try and compare them with other dyno plots.

jspecvtec

iTrader: (4)

Yeah my max torque is at 5k and it seems like ppe has much more torque down low. Maybe the primaries r too large and u lose some bottom end? My baseline is with Joe Z exhaust though. Stock ISF on this dyno is around 350-355whp

foxprime

Wow, a bit loud for my taste. Sounds like a domestic car!

MileHIFcar

Sikky had your car for nearly a year to design these headers??

caymandive

iTrader: (2)

Yes primarily for the header R&D, but they were also working on some other parts at the same time which may or may not be marketed. Obviously they didn't put a full year into it as this was a project they fit in as time permitted, but they were meticulous in testing.

GR8WHITE

Funny, I asked that exact question before they were installed, and and they said they have only seen an increase throughout the range, with the biggest improvement up top. And I can't attest it certainly feels stronger throughout.