BigBlueLB756

Not a good idea to have the exhaust dumping right below the passenger compartment. I'm pretty sure carbon monoxide will kill you just as dead in Italy as it will in the USA. Ride/Drive Safe.

And you really thought you married a virgin?

Information he was looking for was covered in that thread. Sorry you got your feeling hurt that I did not rub his nose in it.

Yes, it is. I just followed the links shown to a conclusion. http://www.siliconeintakes.com/intake-pipe-reducer/pipe-reducer-p-541.html

Google can sometimes be your friend: https://ls1tech.com/forums/lt1-lt4-modifications/1524029-what-size-coupler-buy-lt1-intake.html

Got tired of oiling down the side of my engine with spillover from 5 qt jugs. A little work with a Dremel tool to cut another tab path and a nice steady place for my funnel. You have two tabs at the 12 and 6 positions. Have to cut a new path for the 12 in the new fill tube. https://www.ebay.com/itm/97-09-LS1-LS6-LS2-LQ9-LQ4-Valve-Cover-Oil-Filler-Tube-Extension-NEW-GM-1-TAB/381504135243?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D20160323102634%26meid%3D0c63fdea0c464d4fba7774bd308d8dde%26pid%3D100623%26rk%3D2%26rkt%3D6%26mehot%3Dag%26sd%3D381503368459%26itm%3D381504135243&_trksid=p2047675.c100623.m-1

Are you SURE you've got that first junction between the stock y-pipe and the Carven up tight enough? Should look like this:

Check the orientation of the two locking tabs inside the oil fill hole. If they are at 12 and 6, these filler necks will not sit vertically when installed. If the tabs are at 3 and 9 as shown in this illustration, they'll work. https://www.ebay.com/itm/10-14-LS3-L99-Valve-Cover-Oil-Filler-Tube-Extension-NEW-GM-2-TAB/131665757630?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 On my 2016 Tahoe the tabs are at 12 and 6.

Here's everything you need to know about adding a J-Pipe to your vehicle: "Once again, grasshoppers, the "simplified" formula for determining the length of a Helmholtz quarter-wave chamber dealing with the elimination of a known resonance frequency is as follows: The speed of sound in feet per second (say, 1072feet/second) divided by The frequency you wish to eliminate (say, 128cycles/second) equals 8.375feet/cycle (numbers divide/seconds cancel out) This is the length of a full wave form; much too big to work with under a vehicle. To get a quarter-wave length, divide 8.373feet/cycle by 4 to get 2.09373feet/quarter-wave length. Multiply 2.09373feet/quarter-wave by 12inches/foot to get the chamber length of 25.125". Tube diameter does not affect frequency, only the amount of attenuation. This worked back in 2009, and it still works today. Be sure to use your own target frequency in the formula. The speed of sound figure is not going to vary enough to worry about. We're not rocket scientists. REMEMBER: Be sure to use your own target frequency in the formula."

Buy a Range module and kill that AFM. Your engine will send you roses.

Any of the popular tuners (Hypertech, Diablo, etc.) are single license and therefore retain your stock tune in the tuner when you "insert" their tune into your vehicle's computer. That way, if you need to revert to the stock factory tune when returning to the dealership for warranty work or other maintenance where the vehicle's computer might be updated by the dealer, you'll be OK and your tuner won't become worthless. It's fine. And you can buy your own tuner and do it yourself and save some money. Plenty of help on this forum if you need it.

"If you are willing to pay me, I will be respectful enough of your judgement to accept it".

Shoot! I cut mine three times and it's still too short.

If you're getting old and feeble like me, slap one of these in your valve cover and get all of that oil inside the engine rather than rust-protecting the side of it: https://www.ebay.com/itm/10-14-LS3-L99-Valve-Cover-Oil-Filler-Tube-Extension-NEW-GM-2-TAB/131665757630?hash=item1ea7e405be:g:8I0AAOSwd0BV7Cwm By the way, check to see if the tabs in your valve cover are at the 3 and 9 positions. If they are at 12 and 6, then you'll end up 90 degrees out of phase. Don't ask how I know. (You "digital" people won't be able to figure this out!)

Packaging must be why it costs more, then.