Full exhaust!!

[Saodrin]

So Ive finally convinced myself to save money up for full exhaust. I'm looking for some input on what i should do. So far what I'm thinking is doing some pace setter long tube for headers magna flow cats and 2 flowmaster 10 series and 2.5in pipe dual exhaust. So what do you guys think?

 

[blackcoffee]

Do the long tubes, I have shorty headers and there a *****. Do 3 inch exhaust no mufflers no cats and do a Black Bear performance tune for all of this.

If you want some power that is.
Anything else is restrictive.
The end.

 

[Saodrin]

that would be nice but im pretty sure i need mufflers and cats to pass inspection

 

[Brandon X]

Sounds like a perfectly good plan you got. Only thing id change is leave the cats off but if you have to pass inspection then yeah go with some magnaflow hi flow cats. Also I know PA gets a good bit of snow which means nasty salty roads. If I were you I would think about getting those headers ceramic coated for a little more or coating them yourself.

 

[992door]

Do the long tubes, I have shorty headers and there a *****. Do 3 inch exhaust no mufflers no cats and do a Black Bear performance tune for all of this.

If you want some power that is.
Anything else is restrictive.
The end.

Probably lose a little power like that.

 

[Saodrin]

Sounds like a perfectly good plan you got. Only thing id change is leave the cats off but if you have to pass inspection then yeah go with some magnaflow hi flow cats. Also I know PA gets a good bit of snow which means nasty salty roads. If I were you I would think about getting those headers ceramic coated for a little more or coating them yourself.

thanks xbrandonx. i planned on getting the high flow cats so that helps. and i was going to get the headers ceramic coated because of that reason and i do alot of mudding in the summer. Now all i need to know if those pacesetter long tube headers will be legal

 

[718frankb]

pacesetter long tubes magnaflow cats and any muffler of your choice i like magnaflow .what ever you do dont go bigger than 2.5 other wise you'll be sorry IMO
the pacesetter lt's have o2 bungs and i pass emissions in NY

 

[Brandon X]

thanks xbrandonx. i planned on getting the high flow cats so that helps. and i was going to get the headers ceramic coated because of that reason and i do alot of mudding in the summer. Now all i need to know if those pacesetter long tube headers will be legal

I don't see why they wouldn't be legal but I also don't know what the PA laws are.

But man you will definitely be happy with the outcome of all this. More power and a sweet sound.

 

[Saodrin]

pacesetter long tubes magnaflow cats and any muffler of your choice i like magnaflow .what ever you do dont go bigger than 2.5 other wise you'll be sorry IMO
the pacesetter lt's have o2 bungs and i pass emissions in NY

thanks 718frankb thats very helpful know and do you happen to have a link where i can get these headers ceramic coated i can only find the black painted ones

I don't see why they wouldn't be legal but I also don't know what the PA laws are.

But man you will definitely be happy with the outcome of all this. More power and a sweet sound.

oh yes i cant wait for that sweet sound and the extra power ill get

 

[Brandon X]

I know for a fact Summit sells ceramic coated Pacesetters. Call them and have them give you a price for your tahoe.

 

[Saodrin]

i think i found them for like $451 or $468 on summit

 

[961500]

$468 and a 15 day avg wait to ship. Mine come on the 10th of may. You will have to specify with egr and you will pass inspection for sure. Also get your BB tune to take full advantage of what you're doing.

 

[blackcoffee]

Probably lose a little power like that.

You really think running no cats and mufflers with 3 inch piping and headers with a tune will make you loose power?

 

[Brandon X]

You really think running no cats and mufflers with 3 inch piping and headers with a tune will make you loose power?

I do. You gotta have a little bit of back pressure or else you will ruin things in the long run. Also 3 inch pipe on a stock engine is a little too big, I think all he has is a K&N air filter. 2" - 2.5" seems about right.

 

[drowndindreams]

Our trucks don't run on back pressure. Only turbo-d cars run off of back pressure. (If I'm informed correctly)

 

[retorq]

3 inch single is OK on our trucks, 3 inch duals with no cats and no mufflers is

 

[HotCarl]

Our trucks don't run on back pressure. Only turbo-d cars run off of back pressure. (If I'm informed correctly)

You are correct by saying Turbo'd engines "run" on back pressure to spool the Turbocharger. However, Sufficient back pressure is still needed in a Naturally Aspirated engine. The 2.5 diameter piping is what is optimal for the small block engines that are stock or close to stock. With 3" and bigger you lose low end torque and efficiency. Maybe if he had a built motor and a supercharger he would need bigger than 2.5", but for most applications the 2.5" is fine.

 

[kope]

Our trucks don't run on back pressure. Only turbo-d cars run off of back pressure. (If I'm informed correctly)

my last truck was turbo'ed and back pressure from exhaust is bad. thats why you see Cummins, PowerChokes, Duramax's with big exhaust piping so the turbo can flow as much exhaust through.
Engines do need a slight amount of Back pressure to operate efficiently, NA engines receive this BP from the exhaust system and Turbo'ed vehicles receive it from the turbo itself.

Back to topic,
I'd go with 2.5 piping and just do flanged fittings on the cats and after inspection install a test pipe in place of.

 

[blackcoffee]

Yeah well when I do exhaust I'll be doing no cats with a test pipe in its place with no mufflers and 2.5" pipes. It'll be fine and I really don't see me losing power, I see me gaining power. Will see.

 

[Saodrin]

yeah i planned on having an exhaust shop do all the work since i dont have a welder or a pipe bender so should i just ask them to do flanges on the cats?