Description:
CNC ECONO PORTED Stage 1 HEADS for your 4.7L Dodge Ram, Dakota, Durango, Chrysler Aspen, Jeep Commander or Grand Cherokee are now a reality! We are now able to bring you the BEST ported heads in the business through KNOLTON THUNDER!
Details:
We took the best 4.7L performance heads available and made an economy package with them. You get the same CNC ports but with stock valves/springs/retainers. Our bottom of the line head will out flow/perform most our competitions top of line head!
The Economy heads use:
FACTORY VALVES
FACTORY SPRINGS
MILL HEAD FOR FINE FINISH
CNC STAGE II PORTS
FLOW 7.5 percent LESS THEN RACE PREPPED HEADS
Knolton first starts by hand porting the first port for best possible flow, they then put that port information into their CNC machine and replicates that best port in the rest of the runners. What you get is perfect, equally balanced port flow. This inherently makes HP in itself. They then install STOCK valves/springs/retainers to create an affordable high performance head. Dont let the stock valves/springs/retainers kid you, these heads are no joke and will make outstanding HP gains.
Here are the flow numbers from the last set of ECONOMY PREP HEADS.
STOCK 4.7L HEAD FLOW NUMBERS:
LIFT___INT___________EXH__
100 ----54--------------50
200 ---110--------------87
300 ---146--------------117
400 ---195--------------135
500 ---220--------------141
600 ---226--------------144
ECONOMEY HEADS:
The Economey heads flow aproximately 9% less than the Race Prepped heads:
LIFT___INT___________EXH__
100 ----58--------------50
200 ---117--------------91
300 ---167--------------120
400 ---212--------------144
500 ---238--------------157
600 ---257--------------166
When you step up to these heads your stepping into the real deal.
If a core charge is applicable to you please make sure you select it, we will NOT ship heads without either the core charge up front. If the customer ships his/her own heads then no core charge is required. Customer is responsible for SHIPPING both ways if they chose to send their own heads for porting. We cover shipping to the customer but ALL return shipping is the responsibility of the customer.
Cores MUST BE RETURNED within 3 months (90 days) of receipt of your ported heads. If we do not receive the core returns or do not hear from you within 90 days, we WILL use your core payment to replace the heads we sent to you. Effectively you lose your core deposit if this happens. Please keep us posted and make every effort to return cores in a timely manner...
Dropships direct from manufacturer.
This product was added to our catalog on Saturday 31 August, 2019.
