F/S Intense Stage II Heads w/ 105lb Springs

Shoreguyoc · #1 (**permalink**) 12-07-2007, 07:24 PM

I bought these a month ago but need the funds instead.

I am looking to get $950 shipped, no core needed and ill cover paypal fees and this includes the 105lb Valve Springs.

From Intenses Website:

RETAIL $1699 Plus Shipping NEW.

APPLICATIONS:

* 1995-2004 Bonneville with 3800 Series II engine
* 1996-2002 Camaro with 3800 Series II engine
* 1996-2002 Firebird with 3800 Series II engine
* 1997-2005 Grand Prix with 3800 Series II/III engine
* 2000-2005 Impala with 3800 Series II engine
* 1998-1999 Intrigue with 3800 Series II engine
* 1996-2004 LeSabre with 3800 Series II engine
* 1998-2000 Lumina with 3800 Series II engine
* 1998-2005 Monte Carlo with 3800 Series II engine
* 1995-1999 Oldsmobile 88 with 3800 Series II engine
* 1996-1996 Oldsmobile 98 with 3800 Series II engine
* 1995-2004 Park Avenue with 3800 Series II engine
* 1995-2004 Regal with 3800 Series II engine
* 1995-2005 other applications with 3800 Series II/III engine

We have now studied and flow-bench tested more than a dozen different 3800 Series II head porting designs, and are convinced our Stage 2 heads will outperform any other heads on the market retaining stock valves.

These 3800 Series II cylinder heads are now available for both L36 and L67 engines. They should be used in conjunction with the more aggressive camshaft profiles (such as our INTENSE™ Stage 2 Blower Cam, INTENSE™ Stage 2 Turbo Cam, or INTENSE™ Stage 2 Normally Aspirated Cam), and boost levels ranging from 10 to 20 psi. Note: these heads are NOT recommended for use on an L36 engine, unless an aftermarket power adder has been installed, or you run a high stall torque converter.

Each head is disassembled, inspected, cleaned and extensively ported. Then top quality solid bronze guides are installed and a competition valve job and bowl blending is performed. Stock valves with hardened tips are retained, so the valve tips won't mushroom, even with stock rocker arms. Heavy duty (105 pound) aftermarket valvesprings by CompCams are installed at 1.80" along with steel Manley retainers for extra clearance. These springs and retainers are STANDARD on all INTENSE™ Stage 2 Cylinder Heads. Our heads are machined to handle valve lifts up to .600".

Each head is then painted with your choice of 1966 - 1970 Pontiac Metallic Blue, 1970 - 1975 Buick Red, Aluminum, Black, or Bright Red high-heat engine paint and reassembled (see additional pictures here). By utilizing valvesprings with the stock conical shape, we completely eliminate the possibility of rocker arm to retainer interference found in some other head designs. By properly machining the heads to handle increased valve lifts, we are able to prevent oil seal and valve guide damage that can be caused by cams with gross valve lifts in excess of .525".

From an airflow standpoint, these heads are the best 3800 Series II/III design we have seen (while retaining stock valves):

Intake (28" of water, clay radius to repeat)

.100" - 64 cfm
.200" - 131 cfm
.300" - 177 cfm
.400" - 202 cfm
.500" - 211 cfm
.600" - 214 cfm

Exhaust (28" of water, 1.75" pipe to repeat)

.100" - 55 cfm
.200" - 103 cfm
.300" - 164 cfm
.400" - 183 cfm
.500" - 193 cfm
.600" - 198 cfm

Look for horsepower gains to be in the 15-30 HP range with these heads, greatly dependent on other mods. Good results will be seen on engines with maximum airflow (induction and exhaust), and the best results will be seen on engines with higher boost and/or intercoolers.