Call Us 407-705-3054 Mon-Fri 10AM-6PM EST
 











2004-2005 LS1 LS6 Engine Valley Cover - 12577927

[Part # 12577927]

  • In stock.
  • Ships in 2-7 business days.
  • Ships directly from GM (except international orders).
$91.99 Free Shipping Details
Qty:



The LS6 engine valley cover is an excellent upgrade over the factory LS1 PCV system. This cover eliminates the two rear valve cover PCV hose connections as well as the PCV hose and PCV valve itself. The built-in baffle improves crankcase ventilation and decreases the quantity of oil and contaminants that make it into your intake. The built-in, no-maintenance restrictor eliminates the need for a PCV valve.

Direct bolt-on for 2001-2003 LS1 engines. Earlier LS1 engines require some minor cutting of a boss in the engine valley that interferes with the cover baffle. For vehicles with the LS6 engine valley cover (part #12568002) this is also an upgrade because it eliminates the OEM PCV valve assembly. Also required for the conversion is a valve cover plug (part #12568011), a 5/16" vacuum cap and the valley cover PCV hose (part #12594779). A how to guide for the conversion is available here (please ignore the portion of the instructions regarding re-using the factory PCV valve - this 2004 valley cover has a built-in PCV restrictor and does not require a PCV valve).

Includes

  • GM Part # 12577927 - LS6 engine valley cover
  • GM Part # 12558178 - LS6 engine valley cover gasket
Applications
  • 2004-2005 Cadillac CTS-V
  • 2004 Chevrolet Corvette
  • 2004 Pontiac GTO
  • GM Gen III LS-series engines
Installation Instructions

A how to guide for the conversion is available here (please ignore the portion of the instructions regarding re-using the factory PCV valve - this 2004 valley cover has a built-in PCV restrictor and does not require a PCV valve).

Do you own this product?

There are currently no product reviews.
Customers who bought this product also purchased
RaceFlux Lightweight Viton Racing Hose for Fuel and Oil, -10AN
RaceFlux Lightweight Viton Racing Hose for Fuel and Oil, -10AN
Windage Tray for LS1 Camaro / Firebird (F-Body) - 12558253
Windage Tray for LS1 Camaro / Firebird (F-Body) - 12558253
Single-Piece Replacement Oil Pan Gasket for GM LS Engines
Single-Piece Replacement Oil Pan Gasket for GM LS Engines
LS Engine Oil Pump Pickup Tube Brace / Clamp
LS Engine Oil Pump Pickup Tube Brace / Clamp
Baffled Racing Oil Pan for LS1 Camaro / Firebird (F-Body)
Baffled Racing Oil Pan for LS1 Camaro / Firebird (F-Body)
LS1 Camaro / Firebird (F-Body) Racing Oil Pan Baffle
LS1 Camaro / Firebird (F-Body) Racing Oil Pan Baffle
Valve Cover Gasket for LS1, LS2, LS6 Engine - 12637683
Valve Cover Gasket for LS1, LS2, LS6 Engine - 12637683
Rear Main Seal for LS Engines - 89060436
Rear Main Seal for LS Engines - 89060436
Oil Pickup Tube O-Ring for LS-Series Engine - 12557752
Oil Pickup Tube O-Ring for LS-Series Engine - 12557752
Water Pump Gasket for LS Engines - 12630223
Water Pump Gasket for LS Engines - 12630223
Throttle Body Seal for LS1 & LS6 - 12552542
Throttle Body Seal for LS1 & LS6 - 12552542
Front Main Seal for LS Engines - 12585673
Front Main Seal for LS Engines - 12585673
 
 
 

Item(s) added to cart


 

Adding item(s) to cart...