polobai

More on how to make it fit. The good news is that it requires no modification to the car. The holes are already there to utilize for the front brackets! I used the existing holes in the rear crossmember and added 1/4-20 nutserts. From there I fabbed some simple brackets:


Installing nutserts-these things are the best thing ever!

Results

Then fabbed up simple brackets using 1/16 aluminum flat stock which I riveted to the diffuser.

polobai

From there I fabbed up some rear brackets using thicker 1/8 aluminum flat stock to mount from the oem header brackets


Brackets with nutserts

Passenger side bracket

Drivers side bracket

A look at both brackets mounted

polobai

Not until next week unfortunately. The car is on the lift at home and the seats are out-so it can’t move (don’t want to trip an airbag light). Once the seats are back next week (doing some cool stuff) I will reinstall and get the car on the ground.

polobai

More pics


Taped up and ready to touch up the edges and the brackets

Painted with semi gloss black paint

All done!

polobai

Reinstalled for good!


Back in

A shot showing the profile of the fins from the side

Clearer shot

polobai

All in all, install was not too bad and the diffuser is held in place with 4 allen head bolts. Even with just 4 bolts-this thing isn't going anywhere-I almost hung off the back of it with my full weight (215 lbs) to try to adjust one of the brackets by force and it did nothing. Overall, very pleased with the outcome and I will post some pics of the car next week when its back on the ground.

snake eyes

what exhaust system do you have? Great write up!

Porsche_nuts

What is the ground clearance? Looks like you can bottom out easily.

polobai

Stock PSE with Soul cat bypass’s.

polobai

Ground clearance is low for the fins-I would say 3-4 inches max. Keep in mind, my car is on the lowest spring perch setting in the rear with h&r springs. It’s lower than most gt3s...so I am probably an extreme example. Thankfully I have lots of experience with very low cars but even still I am sure it will get some road rash (the fins)

evilfij

I was with you until you did not use metric nutserts.

great work!

polobai

hahah-I was going to use m6 metric nutserts, however they were a bit too loose in the existing holes compared to the 1/4-20. Trust me, if they fit I would have used them!

Jack F

Since you cut the material off the front, no concern that under speed air will get under this and create pressure issues?

polobai

Not at all. It follows the same profile as it did before so it sits flat to the cross member and the way it’s bolted up in the front, it won’t budge.

911.

Looks really good. Waiting on pics of it on the ground. I had a shop install my H&R springs. What is your rear wheel gap? Trying to see what level they left the rear perches at. Also did you check to see if there is aftermarket units of this, I hate cutting up perfectly fitting OEM stuff ><