Shorty header V ported cast manifold

[mustangman1974]

Well the summer is almost over and I have decided to redo my exhaust system. 6 years as a daily driver has definitely abused the system.

I am considering 3 choices.
1. 2. considering headmans 88400 (1 1/2) or 88650 (1 5/8).
3. I currently have clay extruded cast iron manifolds.

I think the new motor is some where around 285 hp.
I am going to do x-pipe and 2.25 dual through flows.

Oh and and I need compatibility with early engine mounts. Later model ones cause distributer, compressor clearance issues. (don;t ask I have no idea why other then its a true 64.5 mustang PITA)

What do you all think?

 

[Rusty67]

Use a set of 289 hi-po manifolds or a set of 69/70 351w manifolds that have been ported. Also, get 2.5" exhaust.

 

[mustangman1974]

I know my extruded manifolds flow more than k-code. 2.5' isnt that a bit large for my horse power?

 

[Rusty67]

2.5" should be fine for your setup.

 

[oscart]

I have a Flowmaster 2.25" kit with custom bandrell bent h-pipe. The 2.50" setup will give you more options purchasing x-pipe kits as many companies do not go smaller then 2.50". My Doug's headers also came with 2.50" collectors, so that would have been a better transition had I gone with a larger pipe. I like my setup, but the 2.50" might have given me more options.

 

[mustangman1974]

Well I think I might stay with cast iron manifolds. Seems there are clearance issues with shorties and short engine mounts.

Are there any good exhaust kits, preferable bolt-in that anyone has installed? Most shops in Riverside don't mandrel bend or want to connect to cast iron manifolds.

 

[Cyclone]

check out the article that I did for "Mustang & Fords" Magazine
http://www.fly-ford.com/MustangFords0404-SoundsRight.html

 

[Rusty67]

Bolt in kits SUCK. As far as I'm concerned custom mandril bent is the only way to go. Magnaflow mufflers with some tips you like and you are set to go.

 

[Cyclone]

It is a 2 1/2" Mandrel bent pipe system, Plus it was custom cut too fit, With Magna Flow Mufflers and Tips

 

[mustangman1974]

I read that article a while back. My question I did see a "kit." I saw the Dr Gas x-pipe universal conversion. Is that what you're talking about?

 

[Cyclone]

Yes, The only thing we got was the X-Pipe crossover, the rest was all hand fabricated.

 

[mustangman1974]

Yeha I looked and both of you are 2.5 hours away oneway. To long of a drive for me. Would 2 1/4 with Hipo manifolds stiffle possible power?

I can still get the manifolds extruded.

 

[Rusty67]

Which cast iron manifolds are you running ?

 

[mustangman1974]

I am leaning towards Hipos. I called the guy who extruded them last time and he will do it again for a case of beer and some computer work.

I found a 2 1/4 kit at dallas Mustang for 580 with pipes and manifolds for 479. All I have to do is get some flowsmasters.

 

[Rusty67]

I am leaning towards Hipos. I called the guy who extruded them last time and he will do it again for a case of beer and some computer work.

I found a 2 1/4 kit at dallas Mustang for 580 with pipes and manifolds for 479. All I have to do is get some flowsmasters.

Oh GOD, please don't. Flowmasters SUCK for performance. Might as well call them Slow Masters. Get some Magnaflows, they sound WAY better IMO and they definately perform way better.

The Hi-Po manifolds and the 69/70 351w manifolds will perform about the same after a port job which means they will flow as good as almost any header.