.Louthan Competition; Performance Cylinder Heads for domestic and import vehicles... High performance head porting, polishing, rebuilding...

Performance cylinder head rebuilding for import & domestic heads. High performance head porting, polishing, rebuilding

Performance cylinder head rebuilding for import and domestic heads. High performance head porting, polishing, rebuilding

Please see the price schedule below

Sport Compact / Import

You want to run with the fast and the furious ? Running an NOS system can definitely add quick & easy HP, but if you're injecting it through a restrictive stock cylinder head, you're not taking advantage of the full potential of your bottle or your engine.

Uncork your engine with an aftermarket intake manifold and exhaust in addition to a professionally ported cylinder head and you'll blow the doors off your competition !

Pro Top Line Honda VTEC Castings !

LABOR PRICE SCHEDULE
(4 cylinder)

PORTING OPTIONS

For V-6, check the Domestic / Marine page for prices

Valve job (2 valves per cylinder)

$150

Valve job (3 valves per cylinder)

$160

Valve job (4 valves per cylinder)

$180

Replace Valve guides

$10 ea
(plus parts)

Surface:

Aluminum

$40 ea

Iron	$35 ea

Machine seats for larger valves:

2 valves per cylinder

$40

3 valves per cylinder

$60

4 valves per cylinder

$80

* Stage III does not include cost of valves

Stage I:

2 valves per cyl
3 valves per cyl
4 valves per cyl

$300
$400
$500

Basic flow improvement - short side radius contoured and ports polished. The stage I flow improvement will increase your head's efficiency by approximately 20 cfm @ 28" which calculates to an approximate 20 H.P. gain on a 4 cylinder

Stage II:

2 valves per cyl
3 valves per cyl
4 valves per cyl

$400
$500
$600

Basic port job - short side radius contoured and outer ports widened at choke point. The Stage II port job will increase your head's efficiency by approximately 30 cfm @ 28" which calculates to an approximate 30 H.P. gain on a 4 cylinder

Stage III:

2 valves per cyl
3 valves per cyl
4 valves per cyl

$800
$1,000
$1,200

Competition port job - full competition port and polish complete with larger valves installed *.The stage III port job will increase your head's efficiency by at least 40 cfm @ 28" which calculates to a gain of at least 40 H.P. on a 4 cylinder