Make sure you have a clear direction for your car before you spend more money.

What is it you're trying to achieve? Are you stopping for a long time after getting the header, or is the header a part of a long term plan for the car?

If you are just buying a header for the time being, and/or don't have a very clear direction for where you're going but want a header, I'd recommend the JDM OEM 4-1 header as the best bang for the buck.

I like the JDM OEM header over the DC JDM header because the JDM OEM header can be had with upper and lower heat shields that keep your car looking completely stock.

You will feel the difference when mating your JDM header to your stock exhaust. You'll need a Carsound or other cat because the JDM OEM header (and others) will not mate to the stock USDM cat because of a difference in length of the pipe under the car.

Most people who add the JDM OEM header and Carsound cat combination get about 8 horsepower on the dyno, and this is horsepower that you will feel in your normal driving.

If you are going on with developing your car, and the header is just the first step in that plan, then I heartily recommend the SMSP header.

It will cost you quite a bit more to get the SMSP header, and there will be some lead time because SMSP is a small company and makes each header to order.

However, you will get the same gains you will get with other big-name headers and, while you will spend quite a bit more than you would for the JDM OEM header, you will spend quite a bit less on the SMSP header than you'd spend on the competing high quality headers.



Good luck with whatever you decide.