When Precision released their new 46mm Wastegate (available here), we were asked by our clients to do a side by side comparison with the Tial 44mm (available here), you are probably wondering, why not against the Tial 46mm?? and the reason is because even though Tial makes a 46mm, it is the 44mm that has the same mounting flange as Precision’s therefore if you have a header with that mounting flange already on it the decision would be between the Tial 44mm and the Precision 46mm. Below is the observations we were able to make by taking them apart, and comparing their internals.

Tial is a 44mm Wastegate that comes in a multitude of colors. Precision’s has a bit of a larger valve, 46mm, and it is only available in black. The boxes are the same size and they both come packed with the same foam material that completely protects every part from damage during shipping.

Below are the contents of the boxes the way they come, the clear difference is that the Precision comes with 3 extra springs in the box, that way you have the possibility to replace them without having to make a separate order for them.

As for the hardware, both have the banjo design, but the Precision brings an extra plug in case you don’t use one of the ports of the Wastegate and the Tial doesn’t have this in their hardware.

When side by side they look very similar, however the Precision unit is a bit smaller in height compared to the Tial.

The underside again is the same basic design, however you can see how the valve in the precision is a little bit larger (2mm) than the Tial unit.

Once apart, the precision comes standard with 2 springs, and the seat materials are visibly different, I ‘m not qualified to give a breakdown on the materials, however the structure of the seat itself is the same, and even though is hard to tell from the pictures they both use a 4 Allen key setup to hold the seat to the valve itself.

Internally the main difference is Precision uses a longer sleeve to hold the stem of the valve.

And last but not least the literature. Precision comes with a multi page full color instruction’s manual, Tial half a letter size paper printed in both sides.

Hope this can help you make an educated decision when in the market for a Wastegate.

These new Precision PW46 Wastegates feature a 46mm valve, and can be used in a wide variety of applications. They can be used in any kit or setup that currently utilizes a v-band style 44mm gate, but will work best with the supplied inlet flange (the inside diameter of the flange is slightly larger than other competitors).

The wastegates will be shipped with all the necessary hardware (flanges, clamps, springs, etc), and can accommodate a wide range of boost pressures (anywhere from 1.5PSI up to 25.5PSI). All units feature a black, anodized wastegate cap, and a Kevlar reinforced silicone diaphragm. In addition, the unit features a five angle valve job, as well as high temp 17-7 ph springs (more durable and can withstand higher temperatures before changing rate). Lastly, the PW46 is set up for a 1 3/4″ pipe on the discharge side, and a 1 7/8″ pipe on the inlet.