Collar Mod | Best Bang for the Buck Exhaust Mod | Porsche 718 4.0 Liter

A close up look at how the Porsche 718 4.0 Liter collar mod works.
#porsche #gt4 #exhaust #modification #718 #cayman #boxster

[@TBoneForMe]

You can put the collar on without taking the exhaust off. I just finished the job in about 30 minutes. The key is having the right tool. As mentioned in the video, it has hard to get to the little screws because they sit under the ridge of the plunger cup. You need a 2.5 mm Allen wrench. I bought a set of metric Allen wrenches at Lowe's and cut one down so that it is short enough to fit between the screw and the ridge of the plunger cup. With that it is a piece of cake. I used a jack to make it easier to get to, but I guess you could do without. One other helpful hint: when getting the collar on the plunger, leave one screw in but loose to the point of coming out completely. That way you can hold the back of the collar in place on the plunger and just flip the front of the collar around to meet the back. That way you only have to get one screw lined up. I only used one collar on each side. I'm going to drive for a while and then check everything for tightness again. Thanks for the clear video.

[@2111clem]

Thanks for the (very) detailed video. Why just not unplugging the vacuum lines if the valves are open by default? Just seal the lines with something (a screw or whatever) to fake the system and that's it...

[@GethinJames]

Keeping them fully open 100% of the time would produce drone - especially with the stock exhaust.

[@borntokill158]

@@GethinJames Maybe not with the drone delete kit?

[@mdx9286]

@@GethinJames I installed the Soul Performance OAPs with resonators, BMC filters, disconnected the vacuum line and I don't notice any drone.

[@onlinesearch4134]

Flat 6 OAPs offer plugs for the inlet where the vacuum hose attaches.

[@focusedwherever]

I also have an OAP and I don't sense any drone with the valves always open. I have a GR Corolla with the stock exhaust and that definitely drones at slow speed in 1st or 2nd gear. In the GT4, it doesn't make any sounds or frequencies that bother me.

[@waltvancourt5052]

I did that with muffler in place. It helps the sound, but recently i installed OAP with these collars and that really changed the character of the exhaust note ! Like a whole different car now.

[@bernardvreulink2457]

What is a OAP?

[@waltvancourt5052]

@@bernardvreulink2457 Over the axle pipes The pipe between the muffler and the header pipes. Which has a gas particulate filter in the oioe now because of new rules the European union mad porsche add to Save the planet ! and destroys the sound. USA cars are nor monitored by the computer so it's can be replaced with no problems.. soul,, fabspeed aftermarket exhaust companies all see them..they have videos on utube on them. Then that with the shaft collars locks open the vacumn valves that the computer controls.

[@waltvancourt5052]

The pipe between the muffler and the header/cat pipe.

[@GethinJames]

Thanks - but 21 min? Could have been covered in less than 5. I gave up after 6...

[@onlinesearch4134]

Kinda wonder if anytime you stop a shaft from moving, any damage may occur to the original part over time. Appreciate the video but I believe unplugging vacuum lines is probably just as good. Or if you want full play need to go valve controller. To each its own.

[@focusedwherever]

I have an aftermarket over axle pipe, which causes the last set of positioning brackets for the vacuum lines to be lost. By plugging the lines back into the valves, they hang nicely even with those brackets absent. No contact with anything, no sharp bends, etc. At one point, I bought hose plugs and was going to zip tie them, but decided I liked the more secure option of plugging in and using collars. I plan to do a couple checks soon. First if the collars are staying put, then a few months after that, remove the collars and see if everything is still working/moving freely. I didn't consider a valve controller because I like loud all of the time.

[@JeffMcAhren]

Fair question, I've wondered about this, too. Even without the split collars, the shafts are stopped from moving when they reach the limit. With split collars, they just have a different/shorter limit. And since the movement is caused by vacuum (versus a mechanical motor or actuator), I *think* it should be fine. Time will tell.

[@trigganometry168]

Maybe use red loctite so the screws don’t back out with all that vibration.

[@Trophy_R]

As above why not just take the pipe off ?

[@onlinesearch4134]

Subscribed

[@diegopassera4245]

why you don't disconnect from the engine bay che electrical connector of the vacuum line, so the valve are always open?

[@focusedwherever]

Collars are quick and easy. Can be done without even lifting the car. No risk of a CEL.

[@abbittwilkerson2388]

What's the part nuymber for the collars

[@focusedwherever]

Ordered from McMaster-Carr. Part No. 9652T14 Clamping Two-Piece Shaft Collar for 6 mm Diameter, 316 Stainless Steel.

[@bernardvreulink2457]

Thanks .... but way too much "WAFFLE". Anyone that works on his 718 got enough common-sense to grasp what needs to be done in 2 minutes. ;-) Thanks anyway!!!!

[@focusedwherever]

I appreciate the feedback. I don't disagree. Still kind of new at this so working to get the content right. I'm going to check how the collars are doing and post a follow up video. I'll aim to keep that nice and short.