Exhaust› Exhaust Pipes, Systems and Components

Allstar Performance

Exhaust Block Off Plates LS Engines

$20.99

SKU: A02M ALL34218

In Stock
In Stock
Ships by Oct 2
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Allstar Performance ALL34218 is a pair of exhaust port block-off plates designed for GM LS-Series engines. Machined from aluminum, these plates are intended to seal exhaust ports when repairing or storing an engine.
Show original supplier description
Exhaust Block Off Plates LS Engines
Vehicle Symptoms
  • Exhaust port exposed during LS engine head removal
  • Debris entering open exhaust ports during storage
  • Engine rebuild in progress, need to seal ports
  • Prevent moisture damage to exposed exhaust valves
  • After head gasket failure, need to block ports during service
Relevant Conversations
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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

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Specifications

BrandAllstar Performance
Part NumberA02M ALL34218
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(760) 282-4645 hello@motormia.co

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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.

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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.

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