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4.000" Stroke LS, Vortec Engine Crank Scraper & Windage Tray Kit

[Part # EGM-74X]

$279.00 Free Shipping Details
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Improved Racing designed these crankshaft scraper and windage tray kits for direct bolt-on installation in factory and aftermarket 4.000" stroke LS engine configurations. Scrapers are available for most popular aftermarket H-beam and I-beam connecting rods and are compatible with most factory and aftermarket oil pan setups (see application list table below). If you don't see your application below, please contact us for assistance.

Improved Racing's crankshaft scrapers help reduce oil starvation by closely contouring the crankshaft and rods to remove excess oil, ensuring oil is quickly returned to the bottom of the sump. Crank scrapers also help reduce parasitic drag and windage losses caused by excess oil on the crank, which reduces rotational mass and results in dyno-proven gains of 5-10 HP at the wheels.

Our scrapers are CNC-machined from 0.190" thick, 6061-T6 billet aluminum. The crankshaft scraper kits also include an aluminum windage tray that is 10% lighter, 70% stronger, and provides more clearance for aftermarket rods than the factory windage tray. The included windage tray bolts directly to the scraper with self-clinching lock nuts instead of the main cap studs, allowing it to be installed without disturbing the scraper alignment.

The crankshaft scrapers and windage trays were designed in CAD software using actual GM part models, prototyped, and test-fitted for a completely bolt-on fit in every listed application. The factory oil pump pickup tube is kept in the factory location with no compromises or modifications required.

Crank Scraper kits are compatible with factory or ARP main cap studs. Reducer spacers as well as Class 10, flanged zinc-plated steel distorted thread lock nuts are included for use with factory main cap studs. For ARP main cap studs, use the nuts supplied by ARP.

Features and Benefits

  • Guaranteed to increase horsepower by up to 10 WHP
  • Scraper and windage tray assembly is 70% stronger and 10% lighter than the factory windage tray
  • Reduces oil starvation and aeration
  • 100% bolt-on installation
  • Windage tray is secured with locking, vibration-resistant hardware
  • Includes reducer bushings and upgraded main cap stud lock nuts for factory studs
  • Lifetime Warranty
  • Made in the USA
Includes
  • CNC-machined aluminum crank scraper
  • Aluminum windage tray
  • Self-clinching windage tray-to-scraper mounting hardware
  • Flanged, locking scraper-to-main cap stud mounting nuts (for use with factory studs only)
  • 4 x reducer bushings for centering the scraper when using factory main cap studs
Technical Specifications
  • Material: 6061-T6 aluminum (scraper), 5052-H32 aluminum (windage tray)
  • Weight: 2.13-2.52 lbs (0.96-1.14 kg) (complete assembly)
Applications

Please use the table below to select the correct part number for your application. Identify the rod group your connecting rods belong to, then start with the vehicle (or oil pan if an engine swap) you are using in the left column. Move right to find the part number for your specific setup. The factory crankshaft stroke for all LS engines is 3.622", except for the LS7 (4.000") and 4.8 liter blocks (3.267").

These scrapers are not compatible with aftermarket crankshafts with center counterweights (8 counterweights). They are compatible with factory-style, 6-counterweight crankshafts only.


Connecting Rod Groups

Rod Group 0
(Factory Rods)
General Motors All factory LS rods
Rod Group 1 Eagle CRS6125BLW
K1 012AE25610
Lunati All H-beam
Manley All H-beam
Oliver All H-beam
Scat All H-beam
Thompson Motorsports All H-beam
All Others Most other brand H-beam rods not listed in Group 2
Rod Group 2 Callies Compstar H-beam
Callies Ultra I-beam
Eagle All I-beam
Eagle CRS6100L3D
Eagle CRS6100M3D
Eagle CRS6125O3D
Eagle CRS6125O3D2000
Eagle All others not listed
General Motors LS7 Titanium Connecting Rods
General Motors LS9 Connecting Rods
K1 012AE25613
K1 012AE25613ST
K1 012AE25613L
K1 All others not listed
Lunati All I-beam
Manley All I-beam
Oliver All I-beam
Scat All I-beam
Texas Speed All
All Others Most other brand I-beam rods


Crankshaft Scraper Applications

Filters:
  • Chevrolet Camaro SS (LS3 and L99), 2010-2015
  • Chevrolet Camaro ZL1, 2012-2015
  • Chevrolet Caprice (PPV) V8, 2006-2017
  • Chevrolet SS, 2014-2017
  • Holden VE/VF Commodore, 2006-2017
  • Holley 302-1 Oil Pan
  • Pontiac G8 GT & GXP, 2008-2009
  • Vauxhall VXR8, 2008-2017
  • NOTE: May fit additional applications not listed
3.622 Factory EGM-730
3.622 Rod Group 1 EGM-731
3.622 Rod Group 2 EGM-732
4.000 Rod Group 1 EGM-741
4.000 Rod Group 2 EGM-742
  • Chevrolet Camaro SS / Z28 (4th Gen F-Body), 1998-2002
  • Holley 302-2 Front Clearance Oil Pan
  • Moroso Front Clearance Oil Pan
  • Pontiac Trans-Am / WS6 (4th Gen F-Body), 1998-2002
3.622 Factory EGM-730F
3.622 Rod Group 1 EGM-731F
3.622 Rod Group 2 EGM-732F
4.000 Rod Group 1 EGM-741F
4.000 Rod Group 2 EGM-742F
  • Buick Rainier (5.3L), 2004-2007
  • Chevrolet SSR (5.3L, 6.0L), 2003-2006
  • Chevrolet Trailblazer (5.3L, 6.0L), 2003-2009
  • GMC Envoy (5.3L), 2005-2009
  • Holden Commodore (VT, VX, VY & VZ), 1997-2006
  • Holden Monaro (V2 CV8 & VZ), 2001-2005
  • Pontiac GTO, 2004-2006
  • Saab 9-7x (Arc / 5.3i, Aero), 2005-2009
  • Vauxhall Monaro, 2002-2005
3.622 Factory EGM-730G
3.622 Rod Group 1 EGM-731G
3.622 Rod Group 2 EGM-732G
4.000 Rod Group 1 EGM-741G
4.000 Rod Group 2 EGM-742G
  • Cadillac CTS-V, 2004-2015
3.622 Factory EGM-730-X
3.622 Rod Group 1 EGM-731F
3.622 Rod Group 2 EGM-732F
4.000 Rod Group 1 EGM-741F
4.000 Rod Group 2 EGM-742F
  • Chevrolet Corvette (C5), "Batwing" Oil Pan, 1997-2004
  • NOTE: Scraper only, does not use a windage tray
3.622 Factory EGM-330
3.622 Rod Group 1 EGM-331
3.622 Rod Group 2 EGM-332
4.000 Rod Group 1 EGM-341
4.000 Rod Group 2 EGM-342
  • Chevrolet Corvette (C6), Wet Sump, 2005-2013
  • NOTE: Includes a baffle instead of a windage tray.
3.622 Factory EGM-216
3.622 Rod Group 1 EGM-220
3.622 Rod Group 2 EGM-221
4.000 Factory LS7 rods EGM-217
4.000 Rod Group 1 EGM-218
4.000 Rod Group 2 EGM-219
  • Chevrolet Corvette Z06 (C6), LS7 Dry Sump, 2006-2013
Factory 4.000 Factory LS7 rods EGM-740C
  • Chevrolet Colorado / GMC Canyon (5.3L), 2009-2012
  • GM LS Muscle Car and Retro Rod Pan Kit # 19212593
  • Hummer H3 (5.3L), 2010
3.622 Factory EGM-730-X
3.622 Rod Group 1 EGM-731
3.622 Rod Group 2 EGM-732
4.000 Rod Group 1 EGM-741-X
4.000 Rod Group 2 EGM-742-X

Looking for the legacy application list? Click here.

Do you own this product?

1-2 of 2 Reviews Sort By:
5.0
5.0


by Donald H.
09/25/2017
Outstanding quality and product. I had this installed in my GPI forged/stroked LSA build -- everyone commented on the outstanding workmanship and how great the instructions/installation was. Absolutely worth every penny.

http://www.camaro5.com/forums/showpost.php?p=9890496&-
;postcount=1498

Also installed the LS Oil Pan baffle, LS Oil pickup tube support, and their fantastic oil cooler hoses!
5.0
5.0


by Jacob m.
05/19/2017
Very nice piece! Fit my stroker setup without an issue. For the price I wish they would of included new windage tray nuts or made it an option when placing the order.
1-2 of 2 Reviews
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