Was looking at doing a d66 but everyone keeps trying to talk me into the s366. Wasn't keen on spending 1800 for mounting hardware but I started seeing diy posts. Am I going to have to pull my motor or can I drop the tranny to fab the up pipes, bellows and maybe a v band clamp on the drivers side? What do you do for the down pipe, someone sell an adapter to enlarge it to the s366 exhaust side and just weld it on?


It's all going on a 97 F350 cclb 4x4. Taking some lift out so I'll be going down to 35's with rsk. ZF5 and 4.10's. Already intercooled and ts6 and gauges. Will be adding efuel, t500 and I'm thinking Full Force stage 1.5 160's. Not wanting a race truck more building it up for towing.

 

You could probably do it in the truck, just take longer. I bought mine, but a few on here have made them and can help you more. Downpipe is a superduty flange. I bought a 4 inch SD downpipe and tunneled my firewall/floor. You're making a real good choice with the S366.

 

That's the way it sounds. Do you gain anything going with the 4" or would it be easier to weld the sd flange to my 3" dp? Looking at the s366, itself is really reasonable priced. I see them thru Full force and other diesel sites for 750ish. But then I see new ones one ebay for 550-600. Any reason not to save a little and buy the ebay turbo?

 

I have no idea on the ebay vs other places. As for the 4 inch, I had a 3-4 inch dp and 4 inch straight pipe on previous and switched to 4-5 dp with full 5 inch exhaust with muffler. I lost about 50-75 degrees on my egt's towing my load. It is a lot of work to do a 4 inch though.