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ACN Wheelie King Dual Port Cylinder Heads, (L7 heads) 44 X 37.5mm Valves, PAIR
ACN Wheelie King Dual Port Cylinder Heads, (L7 heads) 44 X 37.5mm Valves, PAIR
 
ACN Wheelie King Dual Port Cylinder Heads, (L7 heads) 44 X 37.5mm Valves, PAIR are based on a brand new Revmaster 049 Aircraft Aluminum Head casting! We have seen output in the 240hp range with perfect tunes, but normally these are good for 210-220 HP. Must have 1 3/4" or larger exhaust! Aircooled.Net has sold L7 heads for over a decade, and these are now based on an imported casting. Approximate combustion chamber volume on these head is between 66-68cc (approximate and depending on bore size). Combustion chamber size can be machined to your specification upon request to achieve a more exact compression ratio (select the Specify cc option below).

These heads feature a recently developed new head casting, featuring 12mm x 3/4" Reach plugs (which prevents cracks at the plug threads), Hi Chrome Valve Seats, 44 x 37.5mm Stainless Steel Valves, Silicone Bronze Valve Guides, HD Dual Valve Springs, Chromoly Keepers and Retainers, then finished with a top notch valve job.

You absolutely MUST have an exhaust in the 1 3/4 or 1 7/8" primary size to utilize the flow capability of these heads! Failure to heed this advice can result in difficult (IMPOSSIBLE) tuning issues, and likely cylinder head overheating. It also won't make the power you want!

ACN L7s flow over 220cfm on the intakes at .600" lift, and almost 210cfm at .500" Lift! This creates an incredibly wide and strong power band and torque curve that is hard to comprehend! In fact, these L7s are a top shelf cylinder head, laying waste to most "High Performance" cylinder heads available elsewhere. You absolutely MUST have the cam, exhaust, and intake to go along with them. In fact, this head used to cost around $1200/pair, but the CNC porting and chamber work has dropped the price to where it is now!

Dual 2bbls with venturis in the 42-45mm range are best in your carburetion of choice, dual 48s will work best (DRLA, IDF, or IDA)! At the time of order tell us the chamber cc's you desire and we'll get it done!

With these heads we recommend valve lifts in the .550-.600" range, which is where they will perform at their best.
Price: $899.95
Restrictions: DISCOUNTS/PROMOCODES NOT VALID FOR THIS ITEM


: L7-HEADS-PAIR

Choose Bore Size


Specify your Head Combustion Chamber Size

Specify CC: 		[adds $40.00] optional
[adds $70.00 for PAIR of heads] optional
Custom Made Item Agreement

I AGREE TO THE MADE TO ORDER TERMS THAT APPLY TO THIS ITEM
MADE TO ORDER TERMS and CONDITIONS: This item is made-to-order and cannot be canceled once manufacture has been initiated (which is typically within 24 hours of order submission). Orders for this item are non-cancellable, non-returnable, and non-refundable. Item IS covered by warranty against verifiable defect for 90 days from date of shipment. Please double check your selection and/or specification to be certain you are ordering what you need!



QTY:
Overview
 
ACN Wheelie King Dual Port Cylinder Heads, (L7 heads) 44 X 37.5mm Valves, PAIR are based on a brand new Revmaster 049 Aircraft Aluminum Head casting! We have seen output in the 240hp range with perfect tunes, but normally these are good for 210-220 HP. Must have 1 3/4" or larger exhaust! Aircooled.Net has sold our L7 heads for over a decade, and these are now based on an imported casting.
Item Features
Intake flow a @28 inches of water
Lift-CFM
.050-30.0
.100-57.9
.150-87.5
.200-113.5
.250-135.5
.300-156.2
.350-173.3
.400 -187.4
.450-198.6
.500-207.6
.550-214.0
.600-219.0
.650-226.0

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