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Copper Self Locking Nut Exhaust Manifold Set of 8
Copper Self Locking Nut Exhaust Manifold Set of 8
$10.00
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Camshaft STREET (Columbo & Bariani) 10.9mm Lift Mild Performance Increase
[ARSM-2]
$225.00

STREET PERFORMANCE (NEW - No Exchange Necessary)

This Columbo & Bariani cam is a great street performance upgrade for all Weber and Spica cars. These 10.9mm cams are similar to the factory European 1750/2000 performance profile with the same  good lowend torque, better midrange and a lot more top end.  Duration 244 degrees @ .050" lift. Total Duration 280. 

BASIC SETUP:  A pair of these ARSM-2 Cams is a smooth step up in performance from the stock cams, and brings the engine power a pleasant boost by raising the torque curve mostly on the low end.

HOTTER SETUP:  Substitute our C/B 12.0mm ARST-1 cam on the intake side.  For street performance with emplasis on top end performance.  Up to mid-range will be about the same with both setups.  This combination is the most popular street combo on the planet.

PORTING:  Cleaning up the bowls from valve seats to back guides is quite sufficient for street performane cams without enlarging the runners.  Full porting is marginaly appropriate for street unless you plan to do track days.  Enlarging the ports enhances gain from midrange up and pays handsomely above 7000 rpm.

VALVES:  Enlarging the window into the chambers with our 1mm oversize valves is equally valuable and lets cams have full affect for both street performance and race.

HEADERS:  Cam and porting do make a big difference on their own, but these enhancements will only reach their full potential with our Spruell Motorsport  free flow headers. 

FEATURES:

  • Locktab furh=nished with cam.
  • Lobe Base Circle 1.060" (STANDARD 1.080"). 
  • Bolt in with no clearance issues with any piston. 
  •  We strongly recommend upgrading to VSS12-1 springs for 11.6 and 12mm lift cams.
  • All new and reground cams should be installed with new followers.  There is risk of damage with old followers.  

UPGRADES:

  • Extra lock tabs $3.00 eacj (in addition to one furnished free).
  • Set of followers, add $145.00.
  • Set of coated followers, add $260.00.

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