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Discussion Starter · #1 ·
i got a 96 cobra engine in my 01 gt. i was thinkin about changin out the heads to 00 cobra r head with the 5.4 intake or just a 03-04 heads with an 03-04 intake but cant find where to buy the intake does anyone know where to get them or should i just get the intake and heads that are on ther ported any help would be appriciated
 

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well good luck finding 00R heads, mite be nearly impossible and super super super expensive. ur better off finding some termie heads, but honestly the "b" heads on ur cobra flow so much i doubt you'll pick up any horsepower swapping them. I got my heads raceported, and they are sposed to be good for at least 50hp gain. Sean Hyland Motorsports will port ur cobra intake manifold for 700 bucks and thats sposed to be good for another 50hp too, but when you port those things its only beneficial for boost so id consider throwin in a supercharger or turbo.
 

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post this question in the 4V section and you'll get some great answers as well.
 

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Discussion Starter · #4 ·
well i found the heads just cant find anywhere to get the intake manifold but if porting heads and manifold will do that much then i might go that route where is that shop located you recommended
 

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MM's Ginger
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i heard somewhere that porting isnt cost effective anymore because heads that are made now already flow good, is that true?
 

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well Sean Hyland motorsports will port the intake for like 730.00 or something like that. it's in Canada. I had Houstan Performance port my heads. MMR in cali will port your intake as well. They dont make after market heads for CObra engines. you can swap like FR500's but they arent cost effective at all. Cobra heads already flow really really good, porting them makes them just that much better. But remember, doing a stage one port is ok, but if you do a raceport you neeeeed boost.
 

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b heads are better for boost
c heads are better n/a
take ur pick
 

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MM's Ginger
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well Sean Hyland motorsports will port the intake for like 730.00 or something like that. it's in Canada. I had Houstan Performance port my heads. MMR in cali will port your intake as well. They dont make after market heads for CObra engines. you can swap like FR500's but they arent cost effective at all. Cobra heads already flow really really good, porting them makes them just that much better. But remember, doing a stage one port is ok, but if you do a raceport you neeeeed boost.
what different types of ports are there?
 

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mm's nitrous mod
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the 5.4 heads have larger ports as well, takes some finessing to get a 4.6 intake on the 5.4 head. the 5.4 "R" intake is set up for the 5.4 as well, you would have to hack it up to narrow it for the 4.6 too. that is a high dollar and rare intake manifold to be chopping up as well. the 5.4 ports are too much for a normal 4.6, it takes a good amount of boost or high rpm's to utilize it on a 4.6. you would be better off to get you set up worked over or go with just a regular c-head swap.
 

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well theres like the stage one port, and thats just mild porting. i opted for the full raceport because i have a TT setup. if you're gona leave it N/A, do a stage one. if you're gona do boost and really reach for lota HP, do the raceport.
 

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MM's Ginger
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a machine shop can do this?
 
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