just got precat deletes installed today and wow! car pulls crazy. its totally different animal.

but the smell... used to love that smell during childhood but now it just gives me a headache. currently i have the atlp racepipe, so will swap back on the oem 3rd cat and order the highflow version pretty soon.

btw.. does precat delete makes header hissing sound? or is this an exhaust leak?

 

nevermind on the hissing sound. found a answer to it. jpipe and precats not aligning and use of old gaskets.

 

yea if you stagger the flanges you get a hiss... they have to be perfect

 

I dont get a "hissing" sound, but like many others.. i have the "cold rattle"

basically, on cold starts you hear a rattle... and the first time you really give it some throttle it rattles... after that, never again, until it gets cold.....

i believe its the heat sheild on the drive shaft.... i dont mind it too much.. not worth removing it IMO..

but minkl81, isnt that difference unbelievale? the amount of power you gain for a $250 part..... its outrageous....

 

^ How'd you guys get yours installed and how much you pay?

 

expect to pay around $200.. maybe less... its a good amount of work...the front cat can be replaced your self , if you've got the right tools.. i mean, hell, so can the rear cat...

its one of those jobs, that sometimes spending the money is worth saving the time... i coulda done it myself, but it probably would have taken me like 8-10 hours in my driveway with a jack and socket wrench

i think i paid like $150 for the install from my mechanic... fair price, took him like 3 - 4 hours to do

 

i paid only $75 and took around 3 hours to finish. cant complain.

i only hear the hiss or rumble sound when the tech hits over 5k rpm. also i saw the heatshield on the driveshaft when the car was on the lift and thought it could rattle with very little gap of clearance. but thankfully no rattles yet.

other than that, this is great power mod for its value

 

checked with two different exhaust mechanics for a exhaust leak. no leak found. they say one of the cause might be the increased inflow/outflow restricted by stock exhaust system.

that air whooshing sound is no leak but a detonation sound in the header (precat deletes) that happens before the cats. when header gets hot, it detonates unburnt gas in the exhaust fumes once more before it gets filtered out by cats, thus creating that air leaking sound.

 

I can assure you there is no burning off of unburned gas going on assuming the car is running right. Now when the engine is cold it temporarily richens the mix to get the cats to light off faster so that may explain the cold noise but it should only be for about 10 seconds.

 

BEAUTIFUL numbers, your car is a freakin beast Allon.

 

Thanks bro just waiting for a supercharger

 

How much do you think you'll be puttin down with the s/c? 360+ whp?

 

+/- 360hp..

but still, the lack of tq. =\

but then again, this is a 3.5, lol. with a tune. he'll be proabbly the highest HP TL.

 

Does the smell go away with time???

 

^ Haha na...but you get used to it

 

You got some Nice Numbers. If you ever have a day off, Can we have a friendly run with the 335i. I wanna see how a modded TL stack up against a stock 335.

 

I installed with no axle heatshield... no cold rattles yet

 

Honestly it doesn't even smell that bad. I don't smell anything different in the cabin, even at red lights and stop signs. Maybe its because I only have 30 miles on the deletes...?

 

any dyno sheet?

 

the half shaft heatshield is wat causes a rattle, so since you removed it ur good

 

Ballin

 

I am curious what the results will be too vs a 335i!!

 

i got a friend with a 335i, he will be happy to run. And sure will i Oncei have my hands on that EvoX MR

 

^ I'd race the 335i too shit, I am pretty sure I'd stay within reach, allon's got his stock third cat in, which is robbing anywhere from 5-10hp...

 

Why dont we just do a meet and do some friendly runs. Blackura and You and 335i

 

I am coming.

 

Count me in lol

 

lol... i got my ass HANDED to me by a 33ii coupe on the LIE today... i think it was chipped... had to have been.. never seen a freaking 3 series move like that... and i know how to drive... ive kept up with E46 M3's.... but this thing just embarassed me like i was standing still

 

so you still have that stock third cat... you ever look through that thing, its like a barely visible

 

^ Rv6 res-test-pipe coming soon brah'... i finally gave in..

i think the packing in the ATLP mufflers will help the rasp.... let's see what happens!!

 

Lets meet up Sunday Nov. 9th Which is Actually Tomorrow. If no 1 have a problem with tomorrow. Maybe at 9PM? when ever the highways is open to do couple of rolls?

 

Yeah, that must be the JuiceBox or Vishnu Procede, one of those chips. But the drawback is you can really mess up the engine, the 6th cylinder starts to missfire and the you blow the piston and eventually change the engine which costs $25000 installed at Stealership. Thats is 1 BIG reason im Leaning towards buying the EVOX and not the 335i.

 

I wanna see this

 

335's are wild... i was talking to this guy at the gym with an E92 M3 with exhaust.. and his boy was a chipped 335i blows him away

 

No doubt....chipped 335's can run high 11's/low 12's with intake/exhaust mods. e92 m3's run what...12.7-12.8?

 

SO, you wanna run a stock 335

 

Not, if u change some internals.

 

True but i wont buy a bmw to tune the shit out of it. Ill rather go with the EVOX which i already am

 

forgive my ignorance

what are RV6 Pre-Cat deletes?

 

they are 2.5" SS straight pipes that replace the 2 main catalytic convertors that are attached to the engine block, leading into the jpipe

HUGE performance gains.... with some serious emissions defiecency