Racing Heads  (These heads come with  large ports,( street use is not recomended.)

                          Head Casting           Complete with Manifolds                           
     
      46mm x 37mm   SE-Comp                              $1750
Chamber from 28cc to 70cc, all welding included, SD +.200" valves,
Ti Manley retainers, Manley .05"drop keepers, Cut and set up for K800 springs,
Bore 90.5, 94 or power sleev, Includes IDA or IDF manifolds, all welding and
work to manifolds, NOS ports if needed. Flow Test, carb use for  230hp.
Can run up to .680" lift at the valve.All Work and Hand Porting is by A.J.Sims

     42mm x 37mm  S/F / SE-Comp                       $1700
Chamber from 28cc to 70cc, all welding included, SD valves,
valves, Ti Bugpack retainers, Bugpack keepers,Bugpack Racing Dual springs,
Bore 90.5/92, 94 or power sleev, Includes IDA or IDF manifolds, all welding and
work to manifolds, NOS ports if needed. Flow Test, carb or turbo use.
Can run up to .625" lift at the valve.All Work and Hand Porting is by A.J.Sims

                          
       
     44mm x 38mm   S/F      SE-Comp                       $1850
Chamber from 28cc to 70cc, all welding included, SD +.200" valves, Ti Manley retainers, Manley .05"drop keepers,
re-cut pushrod tube surface angle to seal, Cut and set up for K800 springs, Bore 90.5/92, 94 or power sleev,
Includes Thick Boss IDA or IDF manifolds, all welding and work to manifolds, NOS ports if needed. 
Turbo use for over 400hp. Can run up to .680" lift at the valve.All Work and Hand Porting is by A.J.Sims

      46mm x 38mm  
S/F  /  SE-Comp                 $2500
Chamber volume up to 75cc,all welding included, SD +.200"valves, Ti Manley retainers, Manley .05"drop keepers,
re-cut pushrod tube surface angle to seal, Cut and set up for K800 springs, Bore 90.5/92, 94 or power sleev, Includes
IDA or IDF manifolds and all welding, add NOS ports if needed. Includes Flow Test with copy,
Turbo use for over 500hp.  Can run up to .680" lift at the valve.All Work and Hand Porting is by A.J.Sims
                                   
      48mm x 40mm
S/F & Comp Elims                  $3500      S/F & Comp Elims      50mm x 40mm    $3800
Berg thick 48/51mm intake seats with 38/41mm exhaust seats, Chamber volume up to 75cc, 6th stud,
all welding included, Ti +.200" SD valves , Ti Manley retainers, Manley .05"drop keepers,
re-cut pushrod tube surface angle to seal, Cut and set up for K800 springs, Bore for power sleev, Includes IDA or IDF
manifolds, all welding and port work to manifolds is also included, Add NOS ports if needed. Flow Test with copy,
Turbo use for over 700hp. Carb use for over 260hp
Can run up to .720" lift at the valve. All Work and Hand Porting is by A.J.Sims

Racing Heads Specs
All my work is guaranteed to give you "
More Head For Your Buck" No Fluff & Buff's Here.
* Include Racing 3/5 angle valve job. 90, 70, 60,45,30 and 15 degrees. The 70 and 60 are hand blended into the ports.
* The intake valves receive a extra 30 degrees of back cut to  increase flow.
* The chambers are reshaped for  hi-squish. You will need to run less deck with my heads. This will make your motor burn more efficient.
* Only the best shouldered silicone bronze Racing guides are used.
* Special K800 springs, Manley retainers and keeper combos for your set-up. 
* The highest quality yet still light weight Ti or stainless steel valves are used from Manley, Delwest, Ivam etc.
* Two sets of gaskets are perfectly matched to the ports,
* Each of the barrels surfaces is laped-in and checked for flatness.
* The chambers edge and spark plug hole is deburred. This is to insure that detonation
  can not occur.
* Type 4 style exhaust ports. 1 1/2",1 5/8" or 1 7/8" ID .
* Cc's figures of all 4 chambers are FREE!!
* Your motors compression figures are calculated for FREE!!
* The compression chasing is FREE!! (this means that you tell me the total deck and compression you want to run and I
will fly cut the heads to the desired cc and reach that compression for you)
* Each spring  is shimmed according to your cam & rocker specs.
* I will match and work the manifolds all the way up.
* You have  lots of options with the race heads, springs, retainers, valves, The best thing is to call me.
714-639-4284 and ask for A.J.Sims
E-mail me for info
   Order here
Pricing and info about Race Heads
A.J.Sims
PO.BOX 4343
Orange Ca 92867
aj@skylineauto.com
If you have any questions  call me at: 714-639-4284
I want you to have the fastest yet most reliable set of heads on the market.
That is wy I say:."More Head For Your Buck" A.J.Sims.
Click to see larger pic
Click to see larger pic
Click to see larger pic
Click to see larger pic
Click to see larger pic
Click to see larger pic
Click to see larger pic
Click to see larger pic
The Red Baron runs A.J.Sims pro Heads. With his small 2276cc combo they have this beast running in the low 8.30's in the 1/4 mile at over 165mph. The Red Baron hase 48x40 heads with all the right parts to make big power and do it all year long!! Click here for a video