EP-455 HEI Distributor for Pontiac V8 350-455 (Replaces 1103237)

The EP-455 is a complete HEI ignition distributor for the Pontiac V8 engine family (350, 389, 400, 421, 428, 455 CID) — the engine that powered the original GTO, Firebird, and Trans Am. Pontiac-specific distributor geometry; the Pontiac V8 block is a completely different design from the Chevrolet SBC/BBC and requires its own specific distributor. Red cap with brass terminals, 65,000-volt coil, adjustable vacuum advance. Fits GTO, Firebird, Trans Am, Grand Prix, and LeMans. Replaces OEM 1103237 / 1103704. ISO 9001:2015, CE-EMC, UL, UKCA certified.

EP Aftermarket Ignition Distributor

EP-455 — HEI Distributor for Pontiac V8 350, 389, 400, 421, 428, 455

HEI distributor · Red cap · Pontiac V8 350-455 · 65,000V coil · GTO Firebird Trans Am · Complete

ISO 9001:2015CE-EMCUKCAGlobal Export

Model

EP-455

Type

HEI

Engine

Pontiac V8 350-455

Cap Color

Red

Coil

65,000 V

Technical specifications

ParameterDetail
EP Model No.EP-455
Product typeHEI Ignition Distributor — Complete Assembly
Vehicle applicationPontiac GTO, Firebird, Trans Am, Grand Prix, LeMans — V8 engines
EnginePontiac V8 350, 389, 400, 421, 428, 455 CID
Replaces OEM1103237 / 1103238 / 1103704 / 1103811
IncludesDistributor Body, 65K Coil, Red Cap (brass terminals), Rotor, Module, Adjustable Vacuum Advance
CertificationISO 9001:2015 · CE-EMC · UL · UKCA
BrandEP (Ever-Power)

The EP-455 is a complete HEI distributor for the Pontiac V8 engine family — one of the most celebrated and distinctive American V8 designs, powering the legendary GTO, Firebird, and Trans Am. Pontiac engineers designed their own V8 independent of Chevrolet, with unique displacement choices, combustion chamber designs, and distributor specifications. The Pontiac 400 and 455 are particular favorites in the performance community for their broad power bands and excellent torque characteristics.

Pontiac V8 engines use their own distributor mounting location and drive specifications, requiring a Pontiac-specific HEI unit rather than a generic Chevrolet adaptation. The EP-455 is correctly dimensioned for the Pontiac V8 block, covering the full range from the 350 base engine through the 455 High Output in Firebird Trans Am applications.

Manufactured under ISO 9001:2015 quality management with Pontiac-specific dimensional verification. The EP-455 is available with red cap — the classic performance color that complements the chrome and aluminum accents of classic Pontiac muscle car engine bays.

EP high-precision ignition distributor production equipment

Key features

Pontiac V8 family coverage 350-455

Covers the complete Pontiac V8 family from the 350 through the 455 High Output — the engine that made the Firebird Trans Am the icon it is.

Pontiac-specific distributor geometry

Correctly dimensioned for the Pontiac V8 block — not a Chevy unit with a Pontiac gear.

GTO and Trans Am heritage

Serves the most celebrated Pontiac muscle cars — the original muscle car and the ultimate American performance icon of the 1970s.

65K coil for Pontiac performance

Strong spark for stock and modified Pontiac V8 applications.

Vehicle fitment

MakeModelYearsEngine
PontiacGTO1964-1979389 / 400 / 455 V8
PontiacFirebird / Trans Am1967-1981350 / 400 / 428 / 455 V8
PontiacGrand Prix / LeMans1963-1979350 / 400 / 455 V8
PontiacFull-size / Bonneville1961-1979350 / 400 / 428 / 455 V8

EP HEI distributor full series compatibility overview

Application scenarios

GTO and Trans Am restoration

GTO and Trans Am owners maintaining or upgrading their Pontiac classics use the EP-455 for reliable HEI performance.

Firebird performance build

Firebird Formula and Trans Am owners building performance versions of these iconic F-body Pontiacs choose the EP-455 as part of their ignition upgrade.

Pontiac specialist supply

Shops specializing in Pontiac performance vehicles stock the EP-455 as the definitive Pontiac HEI distributor.

Installation guide

Pontiac V8 distributors are located at the rear of the engine. Disconnect battery, mark cap and housing positions, remove original Pontiac distributor, lower EP-455 to correct Pontiac V8 shaft depth, connect BAT wire and vacuum advance, set timing per Pontiac specification. Do not substitute a Chevrolet unit — Pontiac-specific distributor required. Approximately 30-45 minutes.

Need pricing or technical assistance?

We respond within 24 hours · MOQ as low as 1 unit · OEM/private-label available

Quality assurance

Every EP HEI distributor is manufactured under ISO 9001:2015 certified quality management. Each unit is individually tested for ignition coil output voltage, electronic module switching function, vacuum advance response, and shaft seal integrity before shipment. CE-EMC electromagnetic compatibility certification, UL listing, and UKCA conformity mark ensure full compliance across all major global export markets.

EP ISO 9001 CE EMC UL UKCA certifications

More EP HEI distributors

ModelApplicationEngine
EP-10AJeep AMC V8 290-401AMC V8 290-401
EP-10CChevy SBC 262-400 / BBC 396-454SBC/BBC V8 Red
EP-10Chevy SBC 262-400 / BBC 396-454SBC/BBC V8 Blue
EP-10BKChevy SBC 262-400 / BBC 396-454SBC/BBC V8 Black
EP-10-V6Chevy/Buick/Olds/Pont V6GM V6 229/262
EP-10TBChevy Corvette Tach DriveSBC/BBC Tach
EP-302HEA-1Ford 289-302 5.0 V8Ford SBF Blue
EP-302HEA-2Ford 351 Windsor V8Ford 351W Blue

About the manufacturer

EP (Ever-Power) — Automotive Ignition Specialist Since 1999

25+

Years in production

300+

Distributor models

80%

Export ratio

4

Certifications

EP (Ever-Power) has been manufacturing automotive ignition distributors and motors since 1999, exporting 80% of production to aftermarket distributors across North America, Europe, Australia, and Southeast Asia. Our HEI series is the most complete in the aftermarket — covering Chevrolet, Ford, Pontiac, Oldsmobile, Buick, Cadillac, Chrysler, Jeep, and Holden applications in one product family.

EP ignition distributor manufacturing facility

ISO 9001:2015 quality management, CE-EMC electromagnetic compatibility certification, UL listing, and UKCA conformity cover every unit we ship. Our HEI distributors are manufactured with CNC-machined aluminum housings, 65,000-volt high-output coils, and brass cap terminals tested to OEM and above standards. EP is part of the Ever-Power Group, also producing couplings and a comprehensive range of mechanical transmission products.

Frequently asked questions

What are the symptoms of a failing HEI distributor?
Common symptoms include hard starting, engine misfires at high RPM, rough idle, loss of power under load, and occasional stalling. A failing HEI module (the most common failure component) typically causes complete spark loss when hot — the engine starts fine when cold, stalls after reaching operating temperature, and may restart after a cool-down period. A worn HEI cap with carbon tracking between towers causes crossfire and cylinder-specific misfires that worsen as the cap deteriorates.
Does the EP-455 come with a cap, rotor, and coil?
Yes. The EP-455 ships as a complete ready-to-run assembly including the distributor housing, 65,000-volt high-output ignition coil, distributor cap with brass terminals, rotor, ignition module, adjustable vacuum advance canister, and hold-down hardware. No additional ignition components are required for installation.
Is the Pontiac 400 and 455 distributor the same as the Chevrolet 400 and 454?
No. Despite similar displacements, the Pontiac and Chevrolet V8 engines are completely different designs with different block architectures, distributor locations, and shaft drive configurations. The EP-455 is designed specifically for the Pontiac V8 family. A Chevrolet HEI distributor will not fit a Pontiac V8 block.
Is the EP HEI distributor compatible with aftermarket ignition boxes such as MSD?
EP HEI distributors with a magnetic pickup (Ready-to-Run style) are compatible with external ignition boxes including MSD 6-series, 7-series, and 8-series units, as well as equivalent ignition boxes from Mallory, Crane, and Holley. Standard HEI distributors with an internal module operate as standalone units and do not require an external ignition box, though they can be paired with one for additional timing control. Consult the ignition box manufacturer's instructions for the correct connection procedure.
How do I order the EP-455 for export or wholesale?
EP supports single-unit orders for market sampling, carton quantities for repair shops, and container-volume wholesale orders. Standard production lead time is 15-30 days. OEM branding, private-label packaging, and custom color selection are available for qualifying volumes. Contact our team via the inquiry form or WhatsApp for pricing and availability.

Ready to order EP HEI distributors?

300+ models · 65K coil · Brass terminals · Factory-direct pricing · Global export

Disclaimer: Chevrolet, Ford, Pontiac, Oldsmobile, Buick, Cadillac, Chrysler, Dodge, Plymouth, Jeep, AMC, Holden, Volkswagen, and other vehicle brand names and OEM part numbers are used for product compatibility reference only. EP (Ever-Power) products are high-quality aftermarket replacement parts and are not affiliated with original vehicle or component manufacturers. All trademarks remain the property of their respective owners.

LMC

Additional information

Editd by

LMC

Product Quick Detail:

  • Standard and non-standard available
  • With high quality and competitive price
  • Prompt delivery
  • Packing as per customer’s demand.

We promise will offer the best price by the high quality in china! We also accept special order about the products. If you are interested in our products. Please do not hesitate to let us know.We are pleased to give you the detailed information.We promise that our products would be safety and were in high quality and reasonable price. If you are interested in our products, please contact us asap.We are sincerely looking for your cooperation.

Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.

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Materials Available

1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
4. Bronze: C51000, C52100, C54400, etc
5. Iron: 1213, 12L14,1215
6. Aluminum: Al6061, Al6063
7.OEM according to your request
product materials available

Surface Treatment

Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.

Processing Method

CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly
product finishing

QC & Certificate

Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009

Package & Lead Time

Size: Drawings
Wooden Case/Container and pallet, or as per customized specifications.
15-25days samples. 30-45days offcial order
Port: Shanghai/Ningbo port
product packages

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