Adam@Z1auto.com

Not quite sure what you were expecting but it's a reasonable gain for the parts installed. Many of them could have been skipped altogether Can't compare gains on the older cars vs newer cars at all. Non turbo civics come with substantially more hp than an R5 turbo did

how many track days? what tires are being used? how technical of a track? what brakes (std or brembo)?

various springs have different heights front to back we have all the various specs listed on our site if you're interested

unless the UK fan is different, the KOYO is a direct fit, both the 36mm and 54mm (which I use in my car) fans, unless you're going to go with a very good set of electrics and make/source you'r own shroud, OE works fine. It remains what I use to date on my car (original units) Mishimoto is so so fitment, no idea who or what AMS is, likely another Taiwanese sourced unit

we have fairly wide range from TSW, Konig, Privat and others have a look on these manufacturer sites and if anything we can assist with, drop us a pm

The spiral cable (also known as a clock spring) is not a cable, It is just an electric curcuit board with a sensor. These dont break, once you dont mess about with the steering wheel or steering rack. If your horn works then your spiral cable is fine. However, if the airbag has been deployed then the spiral cable sensor would be broken, even though I cant see how it would break, its just a circuit board. Or if you turn the steering wheel more than it should if the steering rack is out. I have been there. I bought a used one from a breaker for £20 and it worked. Once the airbag has not been deployed or any damage to steering components that would affect the steering wheel moving more than it should, it wil be fine. My horn worked just fine....and the airbag light would intermittently go on, would be able to reset, and then eventually came on more frequently, and ultimately all the time. My car has no side airbags at all ruling that out, and it's never been so much as tapped in a parking lot, let alone hit, so I knew that wasn't an issue. Multimeter revealed a short in the clockspring, replaced it, problem was solved instantly

Could also be a damaged spiral reel section in the steering wheel - quite common as the cars age, had to replace the one in my car. We keep them in stock if needed, as I recall they are around $200 or so + shipping

Those are not NISMO, they are ASM, and have nothing at all to do with the V3 bumper fitment - they were just a styling add on, even on the JDM Spec NISMO and 380RS. These are fiberglass (FRP), the genuine ones are/were metal, and wouldn't surprise me if they were priced the same if not more. As far as pricing, yes they are expensive. Why? Everything from ASM is relatively expensive - 1. because they are all made in Japan, not outsourced to cheaper markets. 2. Quality is literally at OEM levels - not something common in the aftermarket. 3. ASM only makes limited runs of products, so batches are small, and as such, pricing is high. They are a boutique-type manufacturer. The 380RSC is a full on race car, around $400k was selling price, not a road going car can't get the genuine ones from NISMO to the best of my knowledge unless you have proof you own a JDM Spec NISMO/380RS. That's why ASM has theirs released (they are a high end parts manufacturer in Japan, most famous for their limited line of Recaro seats and many exotic parts for the S2000) But for the better news, we have some new ones being released very very shortly - stay tuned to our blog in the next couple of days for full specs and details