S2 Performance
111 Circle Drive
Arlington, TX  76010
Phone:  
817-860-8830
markshaner@sbcglobal.net
CNC Ported L92 / LS3 Heads - SPECIAL $1150.00 exchange
Check out our new CNC ported LS3 / L92 heads.
These have been designed and developed by one of the very best cylinder head shops in the country. This shop only
works with the top professional race teams around the world. ( NHRA & IHRA Pro Stock - NASCAR - Formula 1 - as
well as some of the top European professional race teams.) We were very fortunate to have the opportunity to work
with such a professional shop.
Lift
Intake
2.165
Exhaust
1.590
Stage 2
exhaust
.100
89
52
61
.200
158
107
118
.300
224
155
174
.400
283
209
210
.500
326
229
229
.550
340
232
234
.600
354
234
235
.650
362
237
239
.700
369
239
241
Intake port cut away view
Spring pocket
Rocker arm stud boss
Spring pocket
If you look at the area under the spring pocket, you can
see how thin that area would be if one was to port and
smooth that area to match the contour of the port. (this
can cause the head to crack)

Rocker arm stud boss
If you remove the rocker stud boss, you will only have a few
threads to support your rocker arm stud and springs.
This increase the chance of  the head cracking and if you do
not seal the threads, you will get oil pulled into your intake
charge. (not good)

We do not remove these critical areas.
Flowed on a 4.060 bore @ 28"

Intake
Flowed with a plate - no clay was used to smooth entry..

Exhaust
No pipe was used.
Pricing starting at $1249.00

See list of options below.
Porting options

* We can port your heads or do an exchange - $1249.00 (special $1150.00 exchange)
* New GM castings with stock valves & springs.
* Manley valves
* Upgraded spring packages - Patriot Gold Extreme or PAC springs (see new PAC springs below)
* Mill heads
* Custom oversize intake & exhaust valves with matching port & valve job work. ( for large bore motors )

* Port match your intake
* These are the new PAC 1521 springs with our custom Ti retainers.

* This set-up is good to .675 lift or .700 lift with or optional spring seat.

*  Call for price and availability.