do turbo headers work on a NA motor?

 

I'm looking at options for the exhaust manifold on my frankenmotor build and have been looking at headers on FleaBay....all the headers i've seen for ej25 NA engines have the outlet at 90 deg to the driveline direction....meaning i would need another 90 deg bend to get the exhaust pointed rearward again

 

most of the turbo headers have the outlet pointing directly rearwards which is more what i want....

 

however if turbo headers won't work on a NA motor then i will get the NA headers and alter the rest of the exhaust to fit up to it

 

also are the all dual exhaust port EJ engines able to fit exhaust manifolds from all other years that are dual port?...I.E will a 06 DP header fit a 95 DP motor?

This option looks like it might work, but it isn't cheap.

 

Ebay OBX Header

also are the all dual exhaust port EJ engines able to fit exhaust manifolds from all other years that are dual port?...I.E will a 06 DP header fit a 95 DP motor?

 

 

Yes, so yes, turbo headers will bolt to a non-turbo motor.

 

 

BUT, it will not clear an n/a engine crossmember.

Sorry if this is a hijack but if I used my ea81 turbo coupe crossmember on my hatch and a turbo header which run under $150 bucks on ebay vs $275 up. Then had a connection pipe made up at an exhaust shop that in theory should work right? Plus it would tuck the exhaust up a little higher.

i was thinking about this sort of manifold http://www.ebay.com/itm/Stainless-Steel-Manifold-Header-Impreza-WRX-EJ20-02-07-/350525972720?pt=Motors_Car_Truck_Parts_Accessories&fits=Make%3ASubaru&vxp=mtr&hash=item519cf9e0f0

 

it brings the exhaust out on the right side of the motor to stay clear of my LPG fuel line (reg's mean's there must be an 8" minimum gap between any part of the LPG system and the exhaust)

 

i would just need to make a pipe that goes under the front cross-member and meets up with that type of pipe

Edited January 22, 201214 yr by LPGsuperchargedBrumby

If I recall the turbos also have a different water pump as the turbo manifold would interfere with the normally aspirated one's housing, so the water pump may have to be swapped out as well.

i would just need to make a pipe that goes under the front cross-member

 

BUT, it will not clear an n/a engine crossmember.

 

That flange will be right up against the stock crossmember. It'll take some serious modification

 

If I recall the turbos also have a different water pump as the turbo manifold would interfere with the normally aspirated one's housing, so the water pump may have to be swapped out as well.

 

This is also true. The tstat housing comes straight out the bottom of a n/a pump, and it comes out the front of a turbo. So you'd need a turbo pump and tstat housing.

So you'd need a turbo pump and tstat housing.

 

And lower radiator hose!?

The wrx thermostat comes out really close to the line of the timing belt cover. It looks like the hose would be a pain to route unless you got tricky and had a 90 welded onto the ea81 radiator

 

Here's a shot of my ej22 bolted in with the ea81 radiator in place. Hope that's useful.

 

Picture I got off google search that shows that the thermostat housing on a wrx

Edited January 25, 201214 yr by 86hatchback

lol thats the same type of outlet that i have on my EJ22 with a EA81 rad at the moment....i made up a pipe adaptor to allow me to use the EA

81 radiator cos i was too cheap(poor) to fit a legacy one at the time...its worked fine for 5 years