300 Exhaus mod
Thread Starter
|
Senior User
Joined: Mar 2001
Posts: 150
Likes: 0
300 Exhaus mod
Hey all. I am thinking of putting a single high flow 3 inch cat and a single 12 inch glass pack on my 87 truck with a newer 300 in it. I have a JC whitney dual straght pipe cat back with two glass pack tips, but I am dumping them for 24 X 31/2 chrome angle cuts. What I plan on doing is putting the glass pack before the Y and cutting off the cats that I have now. What I want to know is will this give me enough back pressure? I also plan on getting a K&N filter too. I also want my truck to be loud. Any info is appreciated.
Post Fiend
Joined: Jan 2000
Posts: 5,330
Likes: 17
From: Dryden, ON, Canada
300 Exhaus mod
Why not run a Dual in/Dual out cat, and run duals form there back? Dual glasspacks didn't sound too bad on my truck, I don't know how much a cat would change the sound, but, It probably wouldn't be that much.
Evan MacDonald
82 F100 FlareSide ex. 2wd
MAF MPFI HD 300-6
Hedman Hedder
NP435(6.69 low)
NP205
3.55 Geared ARB'd 9"
Dana 44 TTB
31x10.50/15 Goodyear M/T's
Evan MacDonald
82 F100 FlareSide ex. 2wd
MAF MPFI HD 300-6
Hedman Hedder
NP435(6.69 low)
NP205
3.55 Geared ARB'd 9"
Dana 44 TTB
31x10.50/15 Goodyear M/T's
Thread Starter
|
Senior User
Joined: Mar 2001
Posts: 150
Likes: 0
300 Exhaus mod
My truck has the pre converter and then another converter on it from the factory. From what I have seen and heard having these two cats really makes the trucks very quiet. My buddy has an 88 with a 302 that we cut the rear cat off and just put a Y with two 12 inch glasspacks on and ran it out the back. This made all the difference in the sound. It is really throty. I have knocked out my rear cat already but I want it louder and I don't want to buy headers. The cat that I am going to get is alot shorter than the one I have in the front, and is supposed to be high flowing.
Senior User
Joined: Aug 1999
Posts: 166
Likes: 0
300 Exhaus mod
I've got 2 1/2" duals, dual outlet headers, two 18" turbos and the same chrome tips that you are speaking of. Sounds great and still has plenty of torque. I was worried about killing the bottom end at first, but it has worked out well for me. Mike
1977 F-100
300 I-6 / C-4 (soon to be AOD)
Offy C intake w/Edelbrock 500CFM
Hooker Ceramic coated headers w/duals, turbos, tips, and 02's
MSD6A w/Blaster Coil
Headlight relay system (Delanty style)
Overhead Mount FM-CD etc.
R-134 A/C system (I'm cool)
1977 F-100
300 I-6 / C-4 (soon to be AOD)
Offy C intake w/Edelbrock 500CFM
Hooker Ceramic coated headers w/duals, turbos, tips, and 02's
MSD6A w/Blaster Coil
Headlight relay system (Delanty style)
Overhead Mount FM-CD etc.
R-134 A/C system (I'm cool)
Thread
Thread Starter
Forum
Replies
Last Post
lamenytro
1987 - 1996 F150 & Larger F-Series Trucks
21
Oct 19, 2010 08:19 PM
usmccorrections
Ford Inline Six, 200, 250, 4.9L / 300
27
Feb 6, 2004 01:17 AM
