We have available Big Boy Racing ported and polished cylinder heads for '96 to '03 Mustang GT.
We also have a stage 1 package for '96 to '03 Cobra/Mach 1 Mustang. All setups have been dyno proven and flowbench
tested (I will be posting dyno graphs on the stage 1 package soon). All stage 1 packages for the SOHC and DOHC
have been proven to make big horsepower over stock and are "sniffer friendly". We can install all the mod. motor
parts we sell. These packages will turn your GT or Cobra into a street-strip monster!
4.6 SOHC ported/polished heads
Stage 1 head package includes competition porting, comp. valve job, Ferrera forged SS oversized valves, new
guides, and 7000 RPM spring package. This package is good for another 35-40 HP. If you combine the stage
1 cams with the stage one cylinder heads and all the basic bolt-ons, you will make an extra 80-100 HP and run mid to
low 12's at the track on pump gas! (Your heads exchange.)
Stock SOHC heads
Big Boy Racing competition heads:
As you can see, the heads are opened up quite a bit, which makes a huge performance improvement over stock.
These cylinder heads with a built short block will pull hard to 8,000 RPM!
4.6 DOHC ported/polished heads
Competition porting, competition valve job, Ferrera forged SS bigger valves, Cobra spring package, super
flow bench tested, 45-50 RWHP gains over stock heads. Optional: Ferrera 8000 RPM springs with titanium retainers.
If you add stage 1 cam shafts to this setup, your Cobra/Mach 1 will make 350-370 RWHP and will have no problem running deep
into the 11's at the track on pump gas. The DOHC heads become monsters when you open them up and feed them the correct
custom cams. (Your heads exchange.)
Stock DOHC heads
Big Boy Racing stage 1 competition DOHC heads:
*(call for pricing on DOHC options)
|Big Boy Racing pro built modular long block