Home/All Parts/Proform/Proform Wedge-Locking Header Bolts — 4" — 1975, 1977-1978, 1982, 1984-1994, 1996-1999 Chevy Corvette & more (66823)

TRACKED DELIVERY

Fitment data included Warranty backed Tracked delivery

Product Details

Proform Wedge-Locking Header Bolts, listed for the 1974-1978 and 1982-1986 Chevrolet C10 and 80 more vehicles.

Part number: 66823

PROFORM Wedge-Locking Header Bolts ELIMINATE the need to constantly re-tighten collector bolts, and without the need for clips, pins, racing-wire, chemicals or gunk. The secret is in the Wedge-Locking Washer's super-hardened external teeth that "bite" into the bottom of the bolt head and the top flange surface. Vibrations that normally cause other bolts to loosen, are blocked by the wedge-locking action that uses tension, instead of friction to stay snug. In fact, contact with oil actually facilitates the effect. Installs/uninstalls with a normal wrench, lubricate, and then reuse. Each set comes with sixteen Hex Head, Grade 8 (12.9) steel bolts (3/8"-16 thread, 3/4" long) with a black oxide finish, and pre-assembled Wedge-Locking Washers.

Weight: 1 lb

Confirm this fits your vehicle. Use the “Check Fit” selector, or see the Vehicle Compatibility list below for the years, makes and models listed.

Proform

Proform Wedge-Locking Header Bolts — 4" — 1975, 1977-1978, 1982, 1984-1994, 1996-1999 Chevy Corvette & more (66823)

Name: Proform Wedge-Locking Header Bolts — 4" — 1975, 1977-1978, 1982, 1984-1994, 1996-1999 Chevy Corvette & more (66823)
Brand: Proform
SKU: PFM66823
Price: 58.99 CAD
Availability: BackOrder

Part #: 66823 Special order

$58.99

Price in CAD. Taxes & shipping calculated at checkout.

Canadian company Prices in CAD No duty, brokerage or extra fees at your door

Seen it cheaper somewhere else? Tell us the price and the store and we will try to beat it.

Check it fits your vehicle

See all vehicles it fits

Shipping to Canada: $24.95 · Special order: usually a few weeks, and it can be faster. Message us for an estimate on this part. We confirm your delivery date within 2 business days, and you can cancel at no charge if it doesn't suit you. Not returnable once ordered.Estimate, not a guarantee — if an order will take longer we contact you before taking payment.

Pick your vehicle above to use Buy now and express checkout.

Tracked shipping across CanadaSpecial order · Delivered across Canada · Rate shown at checkout · Shipping details · Shipping and returns

Secure checkoutVISAMCAMEXPAYPAL

Fits these vehicles

1974–1986 Chevrolet C101974–1986 Chevrolet K101974–1986 Chevrolet C10 Suburban1974–1996 Chevrolet Impala1974–1986 Chevrolet K10 Suburban1975–1987 Chevrolet C201975–1986 Chevrolet C20 Suburban1975–1986 Chevrolet C30

Fitment data is provided as a guide — please verify before purchase.

Vehicle fitment

Verified fitment (manufacturer data)

Years	Make	Model
1974	Chevrolet	C10
1974	Chevrolet	K10
1974–1975	Chevrolet	C10 Suburban
1974–1975	Chevrolet	Impala
1974–1975	Chevrolet	K10 Suburban
1975	Chevrolet	C20
1975	Chevrolet	C20 Suburban
1975	Chevrolet	C30
1975	Chevrolet	C50
1975	Chevrolet	Corvette
1975	Chevrolet	El Camino
1975	Chevrolet	G10
1975	Chevrolet	G20
1975	Chevrolet	K10
1975	Chevrolet	K20
1975	Chevrolet	K20 Suburban
1975	Chevrolet	Monte Carlo
1975	Chevrolet	Monza
1975	Chevrolet	Nova
1975	Chevrolet	P10
1975	Chevrolet	P20
1975	Chevrolet	P30
1975–1978	Chevrolet	C10
1975–1978	Chevrolet	C60
1975–1978	Chevrolet	Camaro
1975–1978	Chevrolet	Caprice
1976–1978	Chevrolet	G30
1976–1978	Chevrolet	K5 Blazer
1977–1978	Chevrolet	C10 Suburban
1977–1978	Chevrolet	C20
1977–1978	Chevrolet	C20 Suburban
1977–1978	Chevrolet	C30
1977–1978	Chevrolet	C50
1977–1978	Chevrolet	Corvette
1977–1978	Chevrolet	El Camino
1977–1978	Chevrolet	G10
1977–1978	Chevrolet	G20
1977–1978	Chevrolet	Impala
1977–1978	Chevrolet	K10
1977–1978	Chevrolet	K10 Suburban
1977–1978	Chevrolet	K20
1977–1978	Chevrolet	K20 Suburban
1977–1978	Chevrolet	K30
1977–1978	Chevrolet	Monte Carlo
1977–1978	Chevrolet	Monza
1977–1978	Chevrolet	Nova
1977–1978	Chevrolet	P10
1977–1978	Chevrolet	P20
1977–1978	Chevrolet	P30
1978	Chevrolet	Malibu
1982	Chevrolet	Corvette
1982–1983	Chevrolet	Malibu
1982–1985	Chevrolet	C15
1982–1985	Chevrolet	Celebrity
1982–1985	Chevrolet	Impala
1982–1986	Chevrolet	C10
1982–1986	Chevrolet	C10 Suburban
1982–1986	Chevrolet	C20 Suburban
1982–1986	Chevrolet	C30
1982–1986	Chevrolet	K10
1982–1986	Chevrolet	K10 Suburban
1982–1986	Chevrolet	K20
1982–1986	Chevrolet	K20 Suburban
1982–1986	Chevrolet	K30
1982–1986	Chevrolet	K5 Blazer
1982–1987	Chevrolet	C20
1982–1987	Chevrolet	El Camino
1982–1988	Chevrolet	Monte Carlo
1982–1989	Chevrolet	P20
1982–1990	Chevrolet	B60
1982–1990	Chevrolet	C50
1982–1990	Chevrolet	C60
1982–1994	Chevrolet	Caprice
1982–1994	Chevrolet	G10
1982–1994	Chevrolet	G30
1982–1994	Chevrolet	P30
1982–1995	Chevrolet	G20
1982–1999	Chevrolet	Camaro
1983–1990	Chevrolet	P60
1983–1994	Chevrolet	C35
1984–1994	Chevrolet	Corvette
1985–1990	Chevrolet	P40
1985–1994	Chevrolet	Astro
1986	Chevrolet	C70
1987	Chevrolet	R10
1987	Chevrolet	V10
1987	Chevrolet	V20
1987–1988	Chevrolet	R10 Suburban
1987–1988	Chevrolet	R20
1987–1988	Chevrolet	R20 Suburban
1987–1988	Chevrolet	R30
1987–1988	Chevrolet	V10 Suburban
1987–1988	Chevrolet	V20 Suburban
1987–1988	Chevrolet	V30
1987–1994	Chevrolet	Blazer
1987–1994	Chevrolet	Suburban
1988–1994	Chevrolet	C1500
1988–1994	Chevrolet	C2500
1988–1994	Chevrolet	C3500
1988–1994	Chevrolet	K1500
1988–1994	Chevrolet	K2500
1988–1994	Chevrolet	S10
1988–1994	Chevrolet	S10 Blazer
1988–1999	Chevrolet	K3500
1989	Chevrolet	R2500
1989–1991	Chevrolet	R1500 Suburban
1989–1991	Chevrolet	R2500 Suburban
1989–1991	Chevrolet	R3500
1989–1991	Chevrolet	V1500 Suburban
1989–1991	Chevrolet	V2500 Suburban
1989–1991	Chevrolet	V3500
1991–1994	Chevrolet	C3500HD
1991–1994	Chevrolet	Commercial Chassis
1992–1994	Chevrolet	C1500 Suburban
1992–1994	Chevrolet	C2500 Suburban
1992–1994	Chevrolet	K1500 Suburban
1992–1994	Chevrolet	K2500 Suburban
1993–1994	Chevrolet	GP3500
1993–1994	Chevrolet	W4500 Tiltmaster
1994	Chevrolet	Impala
1995–1999	Chevrolet	W3500 Tiltmaster
1996	Chevrolet	Caprice
1996	Chevrolet	G30
1996	Chevrolet	GP3500
1996	Chevrolet	Impala
1996–1999	Chevrolet	Astro
1996–1999	Chevrolet	Blazer
1996–1999	Chevrolet	C1500
1996–1999	Chevrolet	C1500 Suburban
1996–1999	Chevrolet	C2500
1996–1999	Chevrolet	C2500 Suburban
1996–1999	Chevrolet	C35
1996–1999	Chevrolet	C3500
1996–1999	Chevrolet	Corvette
1996–1999	Chevrolet	Express 1500
1996–1999	Chevrolet	Express 2500
1996–1999	Chevrolet	Express 3500
1996–1999	Chevrolet	K1500
1996–1999	Chevrolet	K1500 Suburban
1996–1999	Chevrolet	K2500
1996–1999	Chevrolet	K2500 Suburban
1996–1999	Chevrolet	P30
1996–1999	Chevrolet	S10
1996–1999	Chevrolet	Silverado
1996–1999	Chevrolet	Suburban 1500
1996–1999	Chevrolet	Tahoe
1996–1999	Chevrolet	W4500 Tiltmaster
1997–1999	Chevrolet	Cargo Van
1999	Chevrolet	L30
1999	Chevrolet	Silverado 1500

Check fitment before you order. We publish fitment from manufacturer and industry data and take care with it, but fit can depend on trim, cab and bed configuration, factory options and any modifications already on your vehicle. If you are unsure, contact us before ordering — and if fitment we published turns out to be wrong, we cover the return.

Specifications

Manufacturer data for this part — all visible, no tabs to dig through.

Brand	Proform
Part number	66823
Warranty	1 year (manufacturer)

Shipping carton	6.75 × 4.5 × 1.75 in (17 × 11 × 4.4 cm)
Shipping weight	0.5 kg (1 lb)
Category	Exhaust & Performance

$58.99special order · delivered across Canada

More from Proform

Reviews

From MapleTorque customers

What customers say about MapleTorque

Quick shipping and very smooth transaction and I will certainly be checking here for future needs

Anonymous Verified buyer

Store review

Outstanding Customer Service!

Excellent shopping experience with MapleTorque! Alex was incredibly responsive, friendly, and genuinely committed to customer satisfaction. He personally helped me with pricing, made the purchase process easy, and even followed up after ...

Vasyl P. Verified buyer