351c 4v headers
Laughing Gas
Joined: Dec 2012
Posts: 801
Likes: 7
From: Toledo, Ohio
. Feel free to send us all a case of beer for our help...
. So, you think the 2V headers are hindering the performance of your 4V engine in the woods?
. So, you think the 2V headers are hindering the performance of your 4V engine in the woods?
Posting Guru
Joined: Nov 2008
Posts: 1,937
Likes: 2
From: wyoming
header stuff.
did a 400 ford with 4v heads. had to change out the flange to the headers and run outside the frame. not a hard job but tedious and took 2 weekends to complete. being your 351 Cleveland with 4v heads is a shorter deck height might need to add a little pipe to get outside the frame. check out some of my photos and you will see my headers on my orange crewcab. the headers are hedman fenderwell exit and 351m400 2v headers and bought a 4v flange from jegs and welded up. tedious and lots of work but good fit. had to do a filler inside header pipe for proper transition from 4v head into pipe. also ran mpgheads exhaust port plates to help on dead spot on lower part of port. Truck is a 1970 crewcab 4wd 400ford with 4v heads. I also have a set of 351c 4v exhaust manifolds that might work in the Cleveland??
Posting Guru
Joined: Nov 2008
Posts: 1,937
Likes: 2
From: wyoming
Have you upgraded headers?
did a 400 ford with 4v heads. had to change out the flange to the headers and run outside the frame. not a hard job but tedious and took 2 weekends to complete. being your 351 Cleveland with 4v heads is a shorter deck height might need to add a little pipe to get outside the frame. check out some of my photos and you will see my headers on my orange crewcab. the headers are hedman fenderwell exit and 351m400 2v headers and bought a 4v flange from jegs and welded up. tedious and lots of work but good fit. had to do a filler inside header pipe for proper transition from 4v head into pipe. also ran mpgheads exhaust port plates to help on dead spot on lower part of port. Truck is a 1970 crewcab 4wd 400ford with 4v heads. I also have a set of 351c 4v exhaust manifolds that might work in the Cleveland??
Posting Guru
Joined: Nov 2008
Posts: 1,937
Likes: 2
From: wyoming
Fender well exit headers headman 89360. Buy 4v header flange cut off 2v flange, weld in new 4v flange. This not a simple process! Being you really need weld in some filler on btm of port for best flow results! I pulled my front clip off truck so I had room to do what I needed. Can do this to any 400 header in frame or fender well exit. Will take couple weekends to complete! Depending on work schedule?
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Thread
Thread Starter
Forum
Replies
Last Post