Diamond Pistons
Diamond Pistons Competition Series Pistons - 11521R18
Diamond Pistons Competition Series Pistons - 11521R18
Regular price
$1,391.99 USD
Regular price
Sale price
$1,391.99 USD
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- Ships direct from the brand or supplier
- Tracking emailed when it ships
- Free fitment check before you order
Diamond Pistons Competition Series Pistons. Check the part number and details below against what you are replacing. Piston and ring size depends on the bore, so match them to your block after it is measured.
Quick facts
- Part type: Piston
- Part number: 11521R18
Specifications
- Precision Engineering: 4.030 in, 4.000 in
Tip: Check ring end gaps in the bore before installation and stagger the gaps.
Diamond Pistons pistons: what to know
Worn rings show up as oil burning, blow-by and low compression.
Fitment notes
- Specs, lead time and warranty come from Diamond Pistons and can change. The details above this guide are the latest we have.
Not sure it fits? Message us your vehicle details and we'll double-check fitment before you buy.
Ask about fitmentWhat else to plan for
- Bearings. Rod and main bearings are usually replaced at the same time.
- Gasket set. The engine comes apart for this job.
More for your car: Pistons · All Pistons · Engine
Questions about pistons
Will this fit my car?
Check the title and details above for the vehicles and part number it is listed for. If you are not sure, contact us with your year, make, model, engine and trim and we will confirm fitment before you order.
Standard or oversize?
Standard fits an unmachined bore. Oversize is for a bored cylinder.
Where do specs and warranty details come from?
From Diamond Pistons. Each brand sets its own specs, lead times and warranty terms, and they can change. The product details above are the latest we have.
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