Gen IV LS3 mounts?

F

Jeff W

Trying to find out what mounts to use. The site search function is not being helpful. I have an NA Gen IV LS3 6.2, I see plenty of folks DIY’ing them, but are there any off-the-shelf ones that will work? Internet searches get me plenty of LS swap mounts, but none look right for the job. My RCR-supplied SLC engine mount crossbar has 2” high support standoffs if that makes any difference.
 
KENS80V

Ken Roberts

Supporter
Here ya go....can't beat this price. SMC Performance. I have purchased numerous things from them over the years.

IMG_0892.jpeg
 
Jkviper

Joel K

Supporter
Jeff, another thing. On a LS-3, You will need a Corvette Shallow oil pan, vs. a deep Camaro Oil Pan for the engine to clear the front mount and not poke out below the frame.
 
L

Mark L

I have a GM427LS ( LS3 ) in my daytona coupe and had to go with a low profile pan. If it helps, these are the parts I used:


Oil pan:

12624617

Pickup tube:

12624497

Windage tray:

12558189

Dip stick:

12570788

Dip stick tube:

12570787

Pickup tube o-ring:

12557752

Gasket:

12612350 or Improved Racing Part No. HGA-1001


mark.
 
Frank833

Frank Clark

Supporter
I have 1 of those LS mounts laying around (and a pair in the car). They come on some GM crate engines as well. Sometimes cheap on ebay - though currently they all look to be well over $100. If anyone needs just one I can figure out which side it is. Free+Shipping to a new home.

On the pan front, the Corvette batwing pans work (I have a spare that needs a good cleanup). Currently I have the Sikky LS Swap Oil Pan- Rear Sump Style 1 in the car. Would be marginal on capacity by it's self, but I have about 2 quarts in coolers. Pressure stays good in the corners. Very happy with it, not cheap, not expensive ($800 ish with remote filter bits and pickup tube).
 
F

Jeff W

Ken's SMC rec was cheaper than Ebay, free shipping. Definitely recommend that. Those Ebay ones have cheaper sticker prices, but then they add absurd shipping fees. Have to dig in to the low profile pans, I'd probably look for an AIO kit rather than piecing all the parts together.
 
KENS80V

Ken Roberts

Supporter
The C5 batwing oil pan that has the removable bottom would be a good choice. Add the Improved Racing baffle inserts for extra insurance.


I'd recommend staying away from those cheap Chinese LS2/3 oil pans.
 
KENS80V

Ken Roberts

Supporter
If you want the very best wet sump LS 2/3 oil pan I'd recommend waiting for the 2026 release of Improved Racings own pan. Not cheap though.
 
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