Audi S4 Catalytic Converter Hardware

Locking nut with flange. M8x1.25mm

Brand:

ES#:

471981

Mfg#:

N91130801

$1.99 USD

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on orders $49 and up

Lifetime Replacement

Install new hardware with your new parts. M10x1.5 2X Entries Into Our F80 M3 Sweepstakes
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Used to secure the catalyst/downpipe to the turbo

Brand:

ES#:

2588753

Mfg#:

N90369001

$4.99 USD

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on orders $49 and up

Lifetime Replacement

Allows the manifold to be secured to the cylinder head. M8x28

Brand:

ES#:

1878317

Mfg#:

N91187001

$7.50 USD

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on orders $49 and up

Lifetime Replacement

Install new hardware with your new parts. M10 Used to secure the catalyst/downpipe to the turbo

Brand:

ES#:

4817

Mfg#:

N90369001

31% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$17.45

This product was last offered at the strikethrough price on
07-08-2026

$11.99 USD

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on orders $49 and up

Lifetime Replacement

Allows the down pipes to be secured to the manifold. M8x30

Brand:

ES#:

467175

Mfg#:

N0445125

3% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$4.86

This product was last offered at the strikethrough price on
07-09-2026

$4.71 USD

Add to Cart

Free Shipping

on orders $49 and up

Lifetime Replacement