4 into 1 step or Try-Y headers for a stocker

[SSDiv6]

Originally Posted by Alan Roehrich

The difference between 4 into 1 headers (no question, at least one step is necessary) with good merge collectors, and 4-2-1 or "tri-y" headers is found in what you can do with the camshaft. The two types of headers require entirely different camshafts. You literally develop your camshaft to compliment the headers, and they're to radically different camshaft programs. Choose a header style that you like, but make sure you have access to someone who can help you make the right camshaft choices.

For every person you find who says that a tri-y is fastest, you'll find at least one person with a fast car who says the 4 into 1 is as fast or faster.

Good luck. Open your wallet.

As Alan has stated, the camshaft has a lot to do with the gain in performance. In addition, you also have to take into consideration that having an OEM intake such as a dual plane, along with the firing order, has also an effect on the use of a particular header design.