Are the inserts stainless steel?

Yes! If they are some other metal it will say on the package.

Will these hold well in an aluminum cylinder head to fix 2 stripped rocker holes, and be long enough?Spring psi. is ~450lbs. open.

I don’t know the specs for my psi but I used this set to fix 2 rockers on a 3.1 Chevy engine, worked perfectly.

I need a heli-coil for an 8 x 32mm motorcycle exhaust header stud of unknown thread pitch, will this product work?

I used one for an exhaust manifold bolt on an Ecotec 2.2L engine (2006 Saturn Vue). It was easily installed. The hole had gotten out of round and to large for the heli-coil itself, so I drilled the head for a 13mm hole and used a piece of13mm Aluminum bar, a little over 30mm and drilled that out and inserted that heli-coil. Everything went together without a problem, but it was just recently done, so time will tell if it lasts forever but I don't invision a problem.

Heli Coil 5546 8 M8 X 1 25 Metric Coarse

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

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¥11631

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

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Description

🛠️ Fix it right, fix it tight — the pro’s choice for thread repair!

ALL IN ONE KIT - Includes tap, installation tool, and clear instructions for effortless use.
COMPACT PORTABLE - Lightweight 0.2 oz kit fits perfectly in your toolbox or glove compartment.
DURABLE RELIABLE - Crafted from premium materials to ensure long-lasting thread strength.
TRUSTED PERFORMANCE - Rated 4.6 stars by 555 pros who demand quality and efficiency.
PRECISION REPAIR POWER - Restore stripped threads flawlessly with 12 high-quality inserts.

The Heli-Coil 5546-8 M8 x 1.25 Metric Coarse Thread Repair Kit is a compact, high-quality solution designed to restore damaged tapped holes with precision. Featuring 12 inserts, a specialized tap, and installation tool, this kit ensures durable thread repairs for automotive and industrial applications. Trusted by professionals and backed by a 4.6-star rating, it combines ease of use with reliable performance in a portable package.

Specifications

ASIN	B0002SREP4
Best Sellers Rank	#92,530 in Automotive ( See Top 100 in Automotive ) #55 in Thread Metric Inserts & Repair Kits
Brand	Helicoil
Customer Reviews	4.6 4.6 out of 5 stars (558)
Date First Available	September 29, 2004
Exterior	Smooth
Item Weight	0.2 ounces
Item model number	5546-8
Manufacturer	Heli-Coil
Manufacturer Part Number	55468
Model	5546-8
National Stock Number	5325-01-554-7009
OEM Part Number	5546-8
Product Dimensions	5.6 x 0.5 x 3.6 inches

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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¥11631

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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