Has anyone ran 4" pipe one a 350?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

OrangeC20

Junior Member
Joined
Oct 19, 2015
Posts
18
Reaction score
1
Location
Walla walla
First Name
Reuben
Truck Year
1974
Truck Model
C20
Engine Size
350
Right now I'm running a 2.5" with a thrush turbo style muffler. One of my friends has a 4" he said he'd give me, but it wasn't on a old truck. I know it won't have as much back pressure but how much will that affect my power?
 

Georgeb

Full Access Member
Joined
Apr 30, 2015
Posts
3,259
Reaction score
214
Location
Wisconsin
First Name
George
Truck Year
2003
Truck Model
K10 Burb Z71
Engine Size
5.3
It could effect it quite a bit. Unless you have a monster motor you don't need that big of exhaust.
 

firebane

Full Access Member
Joined
Jul 10, 2014
Posts
1,732
Reaction score
30
Location
Calgary, AB
First Name
Curtis
Truck Year
1974
Truck Model
K10
Engine Size
350
4 is too big. stick with the 2.5 as it's the best size
 

350runner

Full Access Member
Joined
Feb 9, 2013
Posts
2,858
Reaction score
224
Location
tx
First Name
Ceasar
Truck Year
82
Truck Model
c10
Engine Size
350
If you really want the 4 inch pipe only use it after the muffler as a tail pipe. It'll likely the bigger pipe will make for a deeper exhaust note.

Sent from the dust in front of you!
 
Last edited:

firebane

Full Access Member
Joined
Jul 10, 2014
Posts
1,732
Reaction score
30
Location
Calgary, AB
First Name
Curtis
Truck Year
1974
Truck Model
K10
Engine Size
350
If you really want the 4 inch pipe only use it after the muffler as a trail pipe. It'll likely the bigger pipe will make for a deeper exhaust note.

Sent from the dust in front of you!

And people will look at you funny for having such an absurdity on your truck.
 

350runner

Full Access Member
Joined
Feb 9, 2013
Posts
2,858
Reaction score
224
Location
tx
First Name
Ceasar
Truck Year
82
Truck Model
c10
Engine Size
350
And people will look at you funny for having such an absurdity on your truck.
You'll never get anywhere caring what people think.... Can't be afraid to live life the way you want to.....

Sent from the dust in front of you!
 

OrangeC20

Junior Member
Joined
Oct 19, 2015
Posts
18
Reaction score
1
Location
Walla walla
First Name
Reuben
Truck Year
1974
Truck Model
C20
Engine Size
350
If you really want the 4 inch pipe only use it after the muffler as a tail pipe. It'll likely the bigger pipe will make for a deeper exhaust note.

Sent from the dust in front of you!

That's what I was thinking, and yeah I don't give a sh!t what other people think about me or my truck
 

Green79Scottsdale

Full Access Member
Joined
Aug 8, 2010
Posts
2,834
Reaction score
7,487
Location
G.R. - MI
First Name
Bob
Truck Year
1979
Truck Model
K20
Engine Size
400
I see you are "young" so I give this advice... just put it on and see what happens!!

It will probably kill some low end power, but by how much... who really knows? You might love it... but you will never know unless you just do it! Who cares what a bunch of people on a forum say or think?!
 

shiftpro

Full Access Member
Joined
Aug 31, 2012
Posts
4,855
Reaction score
6,094
Location
BC Canada
First Name
shiftpro
Truck Year
73-87
Truck Model
1500, 2500, 3500
Engine Size
350, 383, 454, 496!
You'll never get anywhere caring what people think.... Can't be afraid to live life the way you want to.....

Sent from the dust in front of you!

Yeah but don't be a dork. Get a Dodger or a Ford if you want to do that.
 

350runner

Full Access Member
Joined
Feb 9, 2013
Posts
2,858
Reaction score
224
Location
tx
First Name
Ceasar
Truck Year
82
Truck Model
c10
Engine Size
350
Yeah but don't be a dork. Get a Dodger or a Ford if you want to do that.
Hey shitpro this isn't the poop thread... Take a dump somewhere else.

Sent from the dust in front of you!
 

350runner

Full Access Member
Joined
Feb 9, 2013
Posts
2,858
Reaction score
224
Location
tx
First Name
Ceasar
Truck Year
82
Truck Model
c10
Engine Size
350
Man this forum gets more ass clowns by the day...

Sent from the dust in front of you!
 

firebane

Full Access Member
Joined
Jul 10, 2014
Posts
1,732
Reaction score
30
Location
Calgary, AB
First Name
Curtis
Truck Year
1974
Truck Model
K10
Engine Size
350
Man this forum gets more ass clowns by the day...

Sent from the dust in front of you!

LOL you need to relax sir. People are just being silly because of the situation. :popcorn:
 

shiftpro

Full Access Member
Joined
Aug 31, 2012
Posts
4,855
Reaction score
6,094
Location
BC Canada
First Name
shiftpro
Truck Year
73-87
Truck Model
1500, 2500, 3500
Engine Size
350, 383, 454, 496!
Hey shitpro this isn't the poop thread... Take a dump somewhere else.

Sent from the dust in front of you!

I'm sorry I've offended you sir but I'm not sure of which excrement you speak of.

George liked it.
 

Jims86

Full Access Member
Joined
Aug 3, 2010
Posts
5,492
Reaction score
135
Location
Patterson,Ca
First Name
Jim
Truck Year
1986
Truck Model
K10 Suburban Silverado
Engine Size
5.7 TBI
You will loose a crapload of low end torque. No bigger than 3" for single, dual 2.25 for duals on a stock-ish engine.
 

Forum statistics

Threads
44,419
Posts
957,218
Members
36,758
Latest member
PapaD
Top