ok i have been looking at diff test pips and why are some test pipes all straight and some have alil curve at the beginning.. ets has a lil curve at beginning but ams is jus straight.. why arent they the same design?

 

any reviews on invidia down/test pipe? does it throw codes?

 

i was curious about that one also!!

 

it all defend on ur catbacks .. i think the testpipe with a lil bent r for catback with oem style fitment .. the straight testpipe r 4 catbacks that in measurement r different (not oem style) .. 4 example tsudo, tsudo use downward straight testpipe ..

-- hint .. try looking where the pipe comes out.. if its in the middle of the muffler .. its an oem fitment..uses bent testpipe ..

--muffler that pipes comes out on the side.. thats probably not an oem type (use st8 testpipes)

jst my 2cents

 

so any else?

 

The AMS has a slight bend on the flanges instead of in the piping itself. It still has OEM fitment, but is a more "free-flowing" design. It will work with any aftermarket exhaust. The other types of downpipes with bends in the piping will fit exactly the same, and are modeled after the stock downpipe.

SniperwolF's statement is not accurate. Please don't give your 2 cents based on speculation.

 

They all handle the bend differently. ETS has a picture of a test pipe that would clank against the driveshaft since they got too close. It was likely a prototype or old design, though. I haven't heard of fitment issues on a modern pipe.

 

so if i get a test pipe that has a slight bend in the pipe it'll b ok for a single type exhaust??