Arias Pistons

Forged Piston Set, 86.5mm Bore

$630.00

SKU: 3730241

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Arias Pistons piston is engineered for Toyota 3TC 1.8L engines, offering a blend of high performance and durability. Constructed from hi-tensile forged 2618 billet material, these pistons are designed to withstand demanding conditions. Key features include CNC machined working surfaces for precision, optimized crowns for efficient combustion, and a diamond-turned ellipsoidal skirt profile. This specific model, part number 3730241, offers a 9.0:1 compression ratio with a dome face type that has a volume of 13.3 cc. The piston features a bore diameter of 86.5mm and a compression height of 1.375". Included with the piston are a comprehensive ring set (T12865, S12865, O30865), pin locks (866X063 SWL), and a high-strength 5100 Chrome Moly Steel wrist pin (866-2250-20CP1C). Arias Pistons has a long history of leadership in compact piston technology, focusing on high-revving, hotter-running engines. For turbo/nitrous applications, Arias offers a more durable, heavy-duty design. The product is listed as 'Back Ordered'.

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

BrandArias Pistons
Part Number3730241
CategoryEngines and Components

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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.

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