ILL Customz offers premium, American-made products custom engineered to elevate your car audio experience to the next level. Calvin, founder of ILL Customz Metalworks is a basshead and car audio enthusiast. He believes in putting the customer first, always. From Ill Customz’s high-quality products and competitive prices to our community-inspired designs and meme-packed newsletter, we never cut corners in delivering a top-notch experience to our loyal fans.
WHAT ILL CUSTOMZ CUSTOMERS ARE SAYING
“Ordered my first product and ordered more as soon as they came in. Amazing quality at a great price. Not to mention the best service and fastest shipping” – David Pinney
“EXCELLENT quality and prices here! I was very happy when I measured the tolerances these guys observe with each product. Consistency matters to me greatly when it comes to my personal install. These are precise down to the millimeter every time. I simply refuse to purchase machined parts from anyone else. I love these guys!” – Stan Lee
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Add to cartQuick ViewAmp Inputs/Gauge Reducers, Ill Customz
ILL Customz Single 1/0 to 1/0 Inputs
$17.95In stock
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Add to cartQuick ViewAlternator Ring Terminals, Alternators, Distribution Blocks, Ill Customz
ILL Customz Nickel Plated Quad Lug Alternator block
$29.95In stock
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Add to cartQuick ViewAmp Inputs/Gauge Reducers, Ill Customz
ILL Customz Dual 8ga to 8ga Speaker Inputs
$17.95In stock
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Add to cartQuick ViewBattery Terminals, Ill Customz
ILL Customz Bolt Down 4 Lug Battery Terminals
$25.95In stock
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Add to cartQuick ViewAmp Inputs/Gauge Reducers, Ill Customz
ILL Customz Single 4ga to 4ga Inputs
$14.95In stock
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Add to cartQuick ViewBattery Terminals, Ill Customz
ILL Customz SAE 4 0ga Input Battery Terminals
$39.95In stock
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B-STOCK - POS PAIRAdd to cartQuick ViewBattery Terminals, Closeouts, Ill Customz
ILL Customz Bolt Down 8 0ga Input Battery Terminals – B-STOCK (POSITIVE PAIR)
$20.00In stock
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Add to cartQuick ViewAmp Inputs/Gauge Reducers, Ill Customz
ILL Customz 4ga to 8ga Reducers
$14.95In stock
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Add to cartQuick ViewBattery Terminals, Ill Customz
ILL Customz Bolt Down 4 0ga Input Battery Terminals
$33.95In stock
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Add to cartQuick ViewAmp Inputs/Gauge Reducers, Ill Customz
ILL Customz 90 Degree Angled Single 1/0 Inputs
$22.95In stock
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Add to cartQuick ViewAmp Inputs/Gauge Reducers, Ill Customz
ILL Customz Dual 1/0 to Single 4ga Inputs
$25.95In stock
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Add to cartQuick ViewDistribution Blocks, Ill Customz
ILL Customz 4 0ga In/Out Distribution Block
$45.95Only 1 left in stock
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Add to cartQuick ViewBattery Terminals, Ill Customz
ILL Customz Bolt Down 6 0ga Input Battery Terminals
$38.95In stock
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Add to cartQuick ViewAmp Inputs/Gauge Reducers, Ill Customz
ILL Customz Angled 1/0 to 1/0 Inputs
$22.95In stock
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Add to cartQuick ViewAmp Inputs/Gauge Reducers, Ill Customz
ILL Customz Angled 1/0 to 4ga Inputs
$22.95In stock
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Add to cartQuick ViewFuse Holders, Ill Customz
ILL Customz 4 Lug ANL Fuse Block
$59.95Only 1 left in stock
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Add to cartQuick ViewHeat Shrink/Connectors, Ill Customz
ILL Customz 4ga Tinned Copper Lugs – 10 Pack
$8.00In stock
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Add to cartQuick ViewBattery Terminals, Ill Customz
ILL Customz SAE 8 0ga Input Battery Terminals
$52.95In stock
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Select optionsQuick ViewHeat Shrink/Connectors, Ill Customz
ILL Customz Blue 1/0ga Heat Shrink
Starting at: $3.95In stock
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Select optionsQuick ViewHeat Shrink/Connectors, Ill Customz
ILL Customz Grey 1/0ga Heat Shrink
Starting at: $3.95In stock
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