I just got my new 4in exhust from magnaflow but it came with a3.5in down pipe

4in the reast of the way. is that all right or shuld i get 4in down pipe I didn't see there was an optionl 4in pipe

 

I would get the 4 inch,
Keith

 

What other mods do you have planned?

A 3.5" dp is enough for most people. So unless you are doing some really heavy mods, you should be just fine.

 

I got AEM brute force intake just orderd gauges and exhust DP tunner next year.

 

3.5" downpipe is perfectly fine, especially if you're still running the stock turbo.

 

The 3.5" will be fine for your setup. In fact, you may see more midrange power than with a 4" DP from some of the findings I've read. Bigger turbo or injectors and I would say a 4" may be necessary. But, I think the H2E (definately more flow than stock) uses a 3.5" DP.