FI Automatic Exhaust Questions
 

Hi all, I am planning on getting the JDL turbo kit with recirculated wastegate, and want to ensure I have plenty of exhaust diameter to support it. My plan was to get a 3" overpipe and frontpipe, then a 2.5" catback, assuming that wouldn't be a bottleneck for my 300whp goal.

I was looking at getting the JDL OP/FP combo, but the site says the 3" option won't fit with an automatic transmission.

My questions are:

-Am I out of luck for a 3" OP/FP with AT? It seems there are very limited 3" options - the only other one I could find was the nameless overpipe and frontpipe combo, but that also supposedly won't work with AT.

-Is 3" even necessary for this setup? Based on what I've found online, it looks like a 2.75"-3.00" diameter is recommended for that power goal, and I figured it'd be better to go larger due to the recirculated wastegate and catted FP.

Any help is appreciated. Thanks in advance.

Maybe the nameless 3" can fit or get it on custom made.

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I will answer all your questions, CUSTOM PIPES.

2.5 is fp/op is good enough unless you're aiming for 450whp+ the biggest bottleneck are the catalytic converters.. also if you go 3" fp op you will have metal on metal contact due to rough fitment causing false knock.. my setup is 2.5 fp op into 3 inch cat back has no issues

I hit 360whp on a stock exhaust with stock diameter piping all the way back, with a stock front pipe.

I don't think you need to worry!

If you want to be sure you hit the goal, ditch the standard pte and go with the upgraded Garrett turbo options.

Edit:: 86speed has a sale right now on the UEL kit with the 2860rs, you'll have no problem getting 300whp with this setup. Comes recirc, too. https://www.86speed.com/jdl-turbo-kit-2860rs-spec-kit

Thanks for the replies, everyone. After additional research, I decided to go with the Tanabe 2.5" OP and JDL 2.5" ultra-quiet FP.

Was already planning on getting the GTX2860R Gen II. :) Unfortunately I'd like EL headers so not sure that sale will be an option, but I'll reach out to JDL.