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Home Cylinder Heads ProMaxx Performance Products Cylinder Heads Maxx BBC 290 Oval Port 2.250/1.88 110cc Bronze Guides 9291
Special Order
ProMaxx Performance Products Cylinder Heads Maxx BBC 290 Oval Port 2.250/1.88 110cc Bronze Guides 9291
ProMaxx Performance Products Cylinder Heads Maxx BBC 290 Oval Port 2.250/1.88 110cc Bronze Guides 9291
ProMaxx Performance Products Cylinder Heads Maxx BBC 290 Oval Port 2.250/1.88 110cc Bronze Guides 9291
  1. ProMaxx Performance Products Cylinder Heads Maxx BBC 290 Oval Port 2.250/1.88 110cc Bronze Guides 9291
  2. ProMaxx Performance Products Cylinder Heads Maxx BBC 290 Oval Port 2.250/1.88 110cc Bronze Guides 9291
  3. ProMaxx Performance Products Cylinder Heads Maxx BBC 290 Oval Port 2.250/1.88 110cc Bronze Guides 9291

ProMaxx Performance Products Cylinder Heads Maxx BBC 290 Oval Port 2.250/1.88 110cc Bronze Guides 9291

PMH9291
OUT OF STOCK, Please contact us for availability BEFORE ordering. This is a SPECIAL ORDER part. This item can be brought in either with a stock order or on it’s own. Contact us today to discuss available options.

$3,068.58

ProMaxx Performance Products Cylinder Heads Maxx BBC 290 Oval Port 2.250/1.88 110cc Bronze Guides

9291 (Sold in Pairs)

The Maxx 290 is truly a rare breed in today’s market. An As Cast head that is just as efficient as competition’s CNC ported pieces. Independent flow bench testing shows over 400 cfm with 2.300 valves. This head will change the industry. Compare to any brand, this head makes power!

Maxx BBC 290 Oval Port 2.250/1.88 110cc Bronze Guides 5 Angle Valve Job Bowl Blended Stainless 1pc Valves Assembled with 600 Lift Hyd Roller Springs (Pair)

Features:

  • 290cc Intake runner
  • 24 degree Intake valve angle
  • 15 degree Exhaust valve angle
  • CNC inspired casting
  • Ultra-smooth casting
  • 356-T6 aluminum
  • Multiple valve sizes available
  • Over 375 cfm
  • .750 deck thickness
  • Diamond honed guides
  • Multiple spring options
  • 5 angle valve job
  • Professional Assembly
  • Machined and Assembled in USA
  • Assemblies include: 21-4N 1pc swirl polished back cut valves, 7/16 studs and guide plates
Flow Data @ 28″ water
lift 200 300 400 500 600 700 800 900
Int 159 233 290 327 357 372 375 376
Ext 135 182 221 261 283 297 303 305

 

Technical Specification:

Combustion Chamber ……110cc
Weight …………………………78.00 lbs.
Intake Runner ……………. 290cc
Exhaust Runner …………..135cc
Intake Valve Size ……….2.250
Exhaust Valve Size …….. 1.88”
Spring Pressure

Hydraulic Roller .600 max lift
Closed …………………… 135 lbs. @ 2.000”
Open …………………….. 365 lbs. @ 1.350”
Solid Roller .700 max lift
Closed …………………… 220lbs. @2.000”
Open …………………….. 600 lbs. @ 1.300”
Solid Roller .900 max lift
Closed …………………… 325 lbs. @ 2.100”
Open …………………….. 840 lbs. @ 1.200”
******* other options available******
Valve Guide ……………Manganese Bronze
Valve Seal Material … Viton
Retainer Material ……Steel
Valve Job ……………… 5-angle
Head Bolts……………. ARP 135-3603 Mark IV/ 135-3607 Mark V
Head Studs ………….. ARP 235-4703 Mark IV/ 235-4713 Mark V
Valve Angle ………. 24/4 intake 15/4 exhaust
Stud Girdle………….Harland Sharp G1114 or equivalent
Valve Seats ……………Hardened Steel
Intake Gasket ………. Fel-Pro 1275
Exhaust Gasket ……. Fel-Pro 1412
Head Gasket ……….. Fel-Pro 1047 Mark V and Mark VI / 1017 Mark IV
Spark Plug …………. .750” Reach Gasket Seat
Torque specs …….. 80 Ft lbs. 3 increments using 30wt oil
Exhaust Ports ………. Raised .375

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Through our distribution network Deliveries can be as fast as Next Day Delivery.
Delivery times vary by destination, tracking information is provided with every purchase.

Get it Installed

JB's Power Centre offers on-site professional installation services in Calgary and Edmonton, AB.
We have on staff licensed Mechanical Technicians as well as MECP Certified 12-Volt Technicians.

* Extend your products Manufacturer Warranty

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JB's Purchase Protection Plan
*Available on select products.