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-   -   97 Cobra -> 03/04 Cobra Top End Swap (https://www.cmoc.ca/4-6l-4v-3/97-cobra-03-04-cobra-top-end-swap-8122/)

White97 03-13-2007 10:41 PM

97 Cobra -> 03/04 Cobra Top End Swap
 
Be prepared for a few more posts as I think up different combinations.

As some of you know, I'm trying to figure out what to do with the Cobra. Right now I have a 97 Cobra with a Vortech S-Trim. This made 419rwhp and 378rwtq without any other modifications really. I blew the head gasket (175,000km on the motor) so I'm going to be pulling the motor and rebuilding it, including forged naughty bits.

After driving my brother's Lightning, I figured that a roots style SC is much more fun on the street.

So how difficult is this swap, pretty straight forward? Anything I need to be aware of? The motor will be out of the car so anything that needs to be done to it is not a problem.

White_Snake 03-14-2007 09:24 AM

if you are thinking about putting all the cobra top end stuff on yours, i have heard/read that is a was of time and money.
i will try and find links stating why.

They do make a KB for our cars.

http://www.svtperformance.com/forum...highlight=eaton

http://www.svtperformance.com/forum...highlight=eaton

http://www.svtperformance.com/forum...highlight=eaton

http://www.svtperformance.com/forum...highlight=eaton

http://www.svtperformance.com/forum...highlight=eaton

http://www.svtperformance.com/forum...highlight=eaton

http://www.svtperformance.com/forum...highlight=eaton

http://www.svtperformance.com/forum...highlight=eaton

http://www.svtperformance.com/forum...highlight=eaton

http://www.svtperformance.com/forum...highlight=eaton

http://www.svtperformance.com/forum...highlight=eaton

http://www.svtperformance.com/forum...highlight=eaton

http://www.svtperformance.com/forum...highlight=eaton

White97 03-14-2007 09:39 AM

Yeah I was comparing it to the KB. I figured it would be cheaper to get an 03 Cobra topend instead of the KB...

BIZ 03-14-2007 05:57 PM


Originally Posted by Flynnt (Post 76157)
Yeah I was comparing it to the KB. I figured it would be cheaper to get an 03 Cobra topend instead of the KB...

nope..you have to custom fab an intake..or at least you use too...
many guys ask..few that I know have done it.

White97 03-14-2007 08:19 PM

You mean air intake or lower intake? It would be an entire head/intake/etc swap.

NXGHOST 03-16-2007 10:29 PM

An 03/04 Cobra top end on our block is a total project. It is not worth the work IMO when you can just forge your motor and keep the V2. You want fun? Put 4.30's in it.

cobra_2004 03-21-2007 08:40 PM


Originally Posted by NXGHOST (Post 76369)
An 03/04 Cobra top end on our block is a total project. It is not worth the work IMO when you can just forge your motor and keep the V2. You want fun? Put 4.30's in it.

agreed, best choice and $$ value goodpost:

Scott@VTEngines 03-29-2007 03:06 PM

Doing the '03 top end blows. Keep what you got.

White97 03-29-2007 05:49 PM

It really does blow! ha ha!

I'm still undecided and it's actually paying off... My bank account is gaining ground for the first time in over a year.

issabel36 10-13-2008 05:56 PM


Originally Posted by Flynnt (Post 76157)
Yeah I was comparing it to the KB. I figured it would be cheaper to get an 03 Cobra topend instead of the KB...

ya you are right.
try 03 with system features 151/48-inch forward-facing headers, two 60mm turbos, and 3-inch downpipes.


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