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LS1, LS6 C5 Corvette "Batwing Oil Pan" Crank Scraper

[Part # EGM-3XX]

$199.00 Free Shipping Details
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Improved Racing designed this crank scraper specifically for use with the C5 Corvette "Batwing" oil pan setup. Because these oil pans are shallow and well-baffled, a windage tray section isn't required and only the scraper section of our kit is included.

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.

These 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
  • Reduces oil starvation and aeration
  • 100% bolt-on installation
  • Contributes over 1.6 lbs (0.73 kg) in weight reduction
  • 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
  • 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
  • Weight: 1.12-1.23 lbs (0.51-0.56 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

  • 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

Looking for the legacy application list? Click here.

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