POSENG Intake Manifold for LS Cathedral Port Cylinder Heads Compatible with L...

Looks good! Came with everything needed! Works and fits like it should. Only thing I didn’t like is how I had to make a throttle cable bracket mounts . Because I’m using short style ls3 injectors with spacers. Still shorter then ls1 ev1 injectors so the rail mounting is different. Had to drill holes in the brackets. If you have long ls1 injectors or use the correct spacing it should work fine. So keep that in mind. Other then that love it

Good intake! Welds were nice and MAP sensor port in the back is perfect to hide wiring. Came with everything needed to install on engine! Really nice anodized black finish!

Bought intake for a 550 approximate horsepower 6.0 Ls brand new had put it on the motor couldn’t get the injector to seal on passenger rear cylinder worked on it several times to get it to seal cycling key what we didn’t know Is that it was a machine issue with the lower oh ring pocket that was dumping the fuel that wasn’t sealing directly into cylinder went to start motor and snapped a rod through the Hydro lock and too much fuel being dumped in motor took intake off the entire head was solid full of fuel that had been dumped into the head from faulty machine workEntire motor needs to be rebuilt re-ring if I can save the block this is at least a $6000 mistake trying to save a few hundred bucks on an intake intake I Called Amazon to find out what could be done but I had bought parts a few months ago Amazon said nothing can be done because the return time is over but I just got the motor running three days ago so I guess I’m out a motor and intake goes in the trash and my build set back weeks.

Looks good quality is there

It doesn't work as a factory replacement. The stock throttle body doesn't fit so you need an adapter. The intake manifold is also lower and more forward than the factory intake. So the water pump needs to be changed or modified. If you use the crossover hose in the front it will interfere with the alternator. I installed it on my 2006 chevrolet tahoe. And because of the design of the intake manifold it has a whistle when running.

I have not ran the car so I dont know how well it will do. As far as fitment though here is my findings:1) It has square ports, with that being said it will fit the cathedral ports but I can't imagine it will flow amazing due to the air encountering the flat edges for the cathedral port towards the top2) The flanges were slightly warped from welding but once bolted down it seems to seal pretty well3)The rear port for the MAP sensor works well for a 2.5bar sensor4)The oring holes on the rails fit very well but the holes on the intake are slightly undersize so the standard ls1 injectors won't go in properly (can be jammed in there but it will most likely cut the oring) I found out that using the OEM blue top oring on the bottom seems to solve this issue.5) The brackets supplied to fasten the rails are bent slightly off so they did not fit without re-drilling the holes. They also have slots on the hole that mounts the bracket to the rail for the side to side play but that is also not long enough.I gave it 4 starts because overall this can be made to work and it is a nice looking piece, but it definitely requires some effing around.

I have to do some research how majority of these intakes are made by the same company in China but this one was less expensive so I ordered it to upgrade my gen 4 F body 2002 Trans Am It came in two days . I began to open the box and started going through it and I noticed there was a chemical haze/ film on the whole intake manifold I try to clean it but was not successful , but that wasn’t the biggest issue all of the mounting hardware manifold gasket fuel rail mounting was all missing but the fuel rail was there was not there the fuel rail was there ,, I went back to the website to check what came with and all that stuff is supposed to be there ,,, as stated in the description ..So I contacted Amazon immediately to let them know and the rep was very helpful apologetic and I was just asking do I get hardware she says no return it and will send you another one I said OK.Replacement Arrived this time the unit did not have this weird film / haze on The entire intake manifold all hardware was there so I returned the original intake manifold missing the hardware that I needed I can’t tell you about the performance but I feel pretty confident when I was comparing the original and this intake it looks like it’s gonna be a pretty good install but I can’t say that yet until I start the installation process,I will give you an update on the entire installation process any any tricks and what issues that may occur

Bad welding. Stay away from this intake. Sucks air from a couple spots and not even 6 months old.