High Flow Cats placement with LTH
#51
Super Member
Thread Starter
Headers have been installed and they've figured out the placement of everything:
Ceramic coated LTH until midpipes, which will be replaced by 3" 200 cell magnaflow cats into 2.5" straight piping with an H where the resonator used to be.
Car will go for 94 octane dyno tune after everything is installed. I am very excited to see what numbers I put down (on the EC Canada 500 WHP unicorn dyno) and how monstrous this will sound. These 200 cell cats look very hollow and tbh quite useless. I just hope it reduces the smell.
Ceramic coated LTH until midpipes, which will be replaced by 3" 200 cell magnaflow cats into 2.5" straight piping with an H where the resonator used to be.
Car will go for 94 octane dyno tune after everything is installed. I am very excited to see what numbers I put down (on the EC Canada 500 WHP unicorn dyno) and how monstrous this will sound. These 200 cell cats look very hollow and tbh quite useless. I just hope it reduces the smell.
#52
MBWorld Fanatic!
I just got my twisted knot of an exhaust system cleared up. Plumbing is all good. I moved my racing cats 200 cell just like yours OP to immediately afternoon collectors and then Mike fabbed me up an H pipe to a custom res delete on my agency power car back.
My car went from sounding like a screaming school girl at high rpm back to the Mercedes signature note. You can literally hear the scavenging when everything is put where it's supposed to be. It's almost as if a sound engineer came in and cleaned up all the rasp and white noise then dropped it down a few octaves. Get on the gas and make the car drop. It's dope. I'll include a video. It's definitely dampened in video format just imagine it twice as loud.
https://vimeo.com/231458973
valves closed
https://vimeo.com/231459413
valves opened
My car went from sounding like a screaming school girl at high rpm back to the Mercedes signature note. You can literally hear the scavenging when everything is put where it's supposed to be. It's almost as if a sound engineer came in and cleaned up all the rasp and white noise then dropped it down a few octaves. Get on the gas and make the car drop. It's dope. I'll include a video. It's definitely dampened in video format just imagine it twice as loud.
https://vimeo.com/231458973
valves closed
https://vimeo.com/231459413
valves opened
#53
Member
Headers have been installed and they've figured out the placement of everything:
Ceramic coated LTH until midpipes, which will be replaced by 3" 200 cell magnaflow cats into 2.5" straight piping with an H where the resonator used to be.
Car will go for 94 octane dyno tune after everything is installed. I am very excited to see what numbers I put down (on the EC Canada 500 WHP unicorn dyno) and how monstrous this will sound. These 200 cell cats look very hollow and tbh quite useless. I just hope it reduces the smell.
Ceramic coated LTH until midpipes, which will be replaced by 3" 200 cell magnaflow cats into 2.5" straight piping with an H where the resonator used to be.
Car will go for 94 octane dyno tune after everything is installed. I am very excited to see what numbers I put down (on the EC Canada 500 WHP unicorn dyno) and how monstrous this will sound. These 200 cell cats look very hollow and tbh quite useless. I just hope it reduces the smell.
I currently have my res deleted replaced with a x pipe and 2nd cats deleted with straights.
I was thinking of going catless but my concern is that it will smell inside the car? I drive the wife and the kid around too...
What do you guys suggest? Will it actually smell inside the car? Will 200 cell cats help with that?
#54
I know this is an old thread but what kind of numbers did you get? Also did those 200 cell cats do anything?? I just got myself a used set of MBH lth and I wanna coat them before installing thanks to these fourms..
I currently have my res deleted replaced with a x pipe and 2nd cats deleted with straights.
I was thinking of going catless but my concern is that it will smell inside the car? I drive the wife and the kid around too...
What do you guys suggest? Will it actually smell inside the car? Will 200 cell cats help with that?
I currently have my res deleted replaced with a x pipe and 2nd cats deleted with straights.
I was thinking of going catless but my concern is that it will smell inside the car? I drive the wife and the kid around too...
What do you guys suggest? Will it actually smell inside the car? Will 200 cell cats help with that?
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doncmleon (04-10-2020)
#55
Junior Member
@DARRYL D I would suggest adding some cats. Just got my MBH headers ceramic coated and installed. I am running MBH LTH, straight miss, into an MBH X Pipe, straight pipes to stock muffler. WAYYYY to loud, raspy, and smelly and that is what I was going for... Adding my cats ASAP. then probably removing x pipe for an h pipe.