Engines and Components› Pistons and Piston Rings

RACE TEC PISTONS

GM LS Dished Piston Set 4.070 Bore -20cc

$799.00

SKU: R0AE 1000720

Out of Stock
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Overview

The RaceTec AutoTec Forged Pistons are a set of 8 high-performance pistons designed for GM LS 15-degree engines. Constructed from durable 4032 high-silicone aluminum alloy, these pistons offer excellent wear resistance, a low expansion rate, and reduced friction. They feature a dish top with no valve reliefs, a 4.070 in. bore, and a -20.00cc piston head volume.
Show original supplier description

Part #: 1000720

Piston - AutoTec - Forged - Dished - 4.070 in Bore - 1.5 x 1.5 x 3.0 mm Ring Grooves - Minus 20.00 cc - GM LS-Series - Set of 8

Vehicle Symptoms
  • Engine knock under load
  • Low compression on one or more cylinders
  • Excessive oil consumption and blue exhaust smoke
  • Rough idle and loss of power
  • Piston slap noise on cold start
Diagnostic Codes
  • P0300 – Random or multiple cylinder misfire
  • P0301 – Cylinder 1 misfire Det
Relevant Conversations
  • LS engine knocking at high RPM – need forged pistons?
  • P0300 code after supercharger install on LS
  • Racetec AutoTec vs Wiseco pistons for 800hp
  • Best piston ring gap for nitrous LS build
  • How to install forged pistons in LS3 – step by step
  • Low compression on cylinder 5 LS – rebuild or replace?
  • LS engine rebuild: forged rods and pistons combo
  • Symptoms of broken piston ring land on LS
  • Piston slap on cold start – is it normal for forged?
  • LS forged piston clearance specs for street use

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandRACE TEC PISTONS
Part NumberR0AE 1000720
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy