Exhaust System
Freshman User
Joined: Apr 2011
Posts: 25
Likes: 0
has anyone purchased the flowtech headers off of the jcwhitney website and how did they fit? Only reason im asking is that they're priced at $139 so they seem fairly cheap for headers but it would be nice to upgrade engine with headers....this would be for a 85 300 6cyl
New User
Joined: Sep 2013
Posts: 8
Likes: 0
this is a old thread that nobody's probably paying attention to anymore BUT i am putting a split manifold on the 300 i just built for my 78 250 the walker 45166 with the welded in Y piece does it restrict flow any compared to the duel pipes coming off like in the other picture? and where can you find the duel pipes ?ford? its all going into a 2 1/4" inch pipe so since the downpipe is already 2 1/4" would it matter the only thing i could see is if maybe where it comes in at that angle it MAY restrict flow compared to the duel pipes
New User
Joined: Sep 2013
Posts: 8
Likes: 0
i saw that part(wonder why they make it like that) i was referring to the fact that OE pipes like on my 94 have duel 2" or better pipes going to the cat straight off the manifold where as the aftermarket such as the walker just had a single pipe the pipe seems big enough that it wouldnt make a difference
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
You saw it AFTER we bored it out.
But the hole in the side of the pipe is only like 1 1/4" inside the fishmouthed part from the factory.
Probably so they can't screw up the weld.
The 2 1/2" Y pipe allows plenty of flow for the low revving 6 and makes it much easier (and cheaper) to put together the rest of the system.
But the hole in the side of the pipe is only like 1 1/4" inside the fishmouthed part from the factory.
Probably so they can't screw up the weld.
The 2 1/2" Y pipe allows plenty of flow for the low revving 6 and makes it much easier (and cheaper) to put together the rest of the system.
thats exactly what i was wondering i always thought those two huge pipes going to the cat where overkill and bulky for a 6 cylinder
Thread
Thread Starter
Forum
Replies
Last Post
rico56
1948 - 1956 F1, F100 & Larger F-Series Trucks
19
Jul 10, 2017 04:40 PM
bluemtn95ford
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
1
Jan 5, 2016 06:38 PM
fairfax9
1987 - 1996 F150 & Larger F-Series Trucks
11
Jan 17, 2010 04:58 AM
